Kyushu University Academic Staff Educational and Research Activities Database
List of Papers
Kin Tadahiro Last modified date:2021.06.26

Associate Professor / Energy System Technology / Department of Advanced Energy Science and Engineering / Faculty of Engineering Sciences


Papers
1. Hayato Takeshita, Yukinobu Watanabe, Keita Nakano, Seiya Manabe, Katsumi Aoki, Naoto Araki, Kosuke Yoshinami, Tadahiro Kin, Nobuhiro Shigyo, Jun Koga, So Makise, Tamaki Yoshioka, Masaomi Tanaka, Takashi Teranishi, Thick target neutron yields from LiF, C, Si, Ni, Mo, and Ta bombarded by 6.7 MeV/u deuterons, Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 10.1016/j.nima.2020.164582, 983, 2020.12, Double-differential thick target neutron yields from the bombardment of LiF, C, Si, Ni, Mo, and Ta targets by 6.7 MeV/u deuterons were measured at forward angles using an EJ-301 liquid organic scintillator. The neutron energy spectra were derived via an unfolding method using the FORIST code with the detector response function calculated using the SCINFUL-QMD code. The neutron energy spectra and total neutron yields at 0 from the deuteron incidences were compared with the previous data of triton incidences on LiF, Si, Ni, Mo, and Ta targets measured at the same incident energy per nucleon. The comparison revealed that deuterons yield more neutrons for low-Z targets than tritons, and less neutrons for high-Z targets. The measured neutron energy spectra were compared with model calculations using the DEUteron-induced Reaction Analysis Code System (DEURACS). DEURACS successfully reproduced the neutron spectra from all the targets. For the triton incidence, some calculation codes were benchmarked, with JQMD/GEM and CCONE yielding good agreement with the measured neutron spectra at 0..
2. Masumi Oshima, Jun Goto, Tomoko Haraga, Tadahiro Kin, Yurie Ikebe, Hirofumi Seto, Shigeru Bamba, Hirofumi Shinoharaa, Takao Morimoto, Keisuke Isogai, Application of multiple gamma-ray detection to long-lived radioactive nuclide determination in environmental samples, Journal of Nuclear Science and Technology, 10.1080/00223131.2019.1710614, 57, 6, 663-670, 2020.01, Gamma-gamma coincidence measurement utilized in gamma-ray spectroscopy experiments
is well known to be effective for the improvement of signal-to-noise ratio in a -ray spectrum.
We study its applicability to determination of long-lived radioactive nuclides in
environmental samples. The -ray simulation code Geant 4.10.2 was used. A conventional and
effective detector system comprising five Ge detectors was assumed. We took up thirty five
nuclides which need to be determined for the evaluation of fission product leakage at the
nuclear accident in the Fukushima nuclear power plants in Japan. Among them twelve
nuclides emit gamma-rays and five nuclides of 60Co, 94Nb, 134Cs, 152Eu and 154Eu can be the
objectives of the multiple gamma-ray sletection method. The simulation results indicate that thesignal-to-noise ratio can be improved by a factor between 9.84 and 283, and the detection
limit by a factor between 2.71 and 8.53 relative to the singles measurement, implying that the
method can be well applied to the determination of the long-lived radioactive nuclides and
will provide a quick and non-destructive analysis method..
3. Md Kawchar Ahmed Patwary, Tadahiro Kin, Katsumi Aoki, Kosuke Yoshinami, Masaya Yamaguchi, Yukinobu Watanabe, Kazuaki Tsukada, Nozomi Sato, Masato Asai, Tetsuya K. Sato, Yuichi Hatsukawa, Shinsuke Nakayama, Measurement of double-differential thick-target neutron yields of the C(d,n) reaction at 12, 20, and 30 MeV, journal of nuclear science and technology, 10.1080/00223131.2020.1819908, 58, 252-258, 2020.09, While designing deuteron accelerator neutron sources for radioisotope production, nuclear data for light elements such as Li, Be, and C have been systematically measured in the deuteron energy range from a few MeV to around 50 MeV. Currently, the experimental data available on double-differential thick-target neutron yields (DDTTNYs) are insufficient, especially for deuteron energies between 18 and 33 MeV. In this study, we measured the DDTTNYs of (d,n) reactions on natC target for incident deuteron energies of 12, 20, and 30 MeV using the multiple-foil activation method to improve nuclear data insufficiency. The neutrons were detected at emission angles of 0°, 10°, 20°, 30°, and 45°. We applied the GRAVEL code for the unfolding process to derive the DDTTNYs. The results were compared with the calculation by the deuteron-induced reaction analysis code system (DEURACS), and the DEURACS calculation underestimated our results 12 and 20 MeV deuteron. The present data were also used to confirm the systematics of the differential neutron yields at 0° and total neutron yield per incident deuteron in 12–30 MeV of deuteron energy..
4. Md Kawchar Ahmed Patwary, Tadahiro Kin, Naoto Araki, Katsumi Aoki, Kosuke Yoshinami, Masaya Yamaguchi, Yukinobu Watanabe, Masatoshi Itoh, Feasibility study of radioisotope132Cs production using accelerator-based neutrons, Evergreen, 6, 4, 280-284, 2019.12, We propose that132Cs (Eγ = 668 keV and T1/2 = 6.5 d) can replace137Cs (Eγ = 662 keV and T1/2 = 30 y) as a new environmental tracer of cesium. The alternative tracer,132Cs, can potentially reveal the short-time dynamics in an environment, which are considered to dominate radioactive cesium absorption after nuclear accidents. We first investigate the production yield and radioactive purity of132Cs in a production experiment at the Cyclotron and Radioisotope Center of Tohoku University. The132Cs was produced via the133Cs(n,2n) reaction with neutrons generated by bombarding accelerated deuterons onto a 4 mm-thick neutron converter made of carbon. The generated neutrons were then irradiated onto a Cs2CO3 sample. The experiment yielded 102.2 kBq/g of132Cs, sufficient for tracing environmental cesium. The radioactive purity reached 98%, indicating negligible amounts of by-products. Next, a132Cs tracer experiment was performed on three different soil samples: an andosol soil, a haplic fluvisol soil, and a gleyic fluvisol soil. This feasibility study confirmed that the new tracer can measure soil cesium distributions as adequately as the137Cs tracer. Thus, we conclude that132Cs is a promising alternative environmental tracer of 137 Cs..
5. Keita Nakano, Yukinobu Watanabe, Shoichiro Kawase, He Wang, Hideaki Otsu, Hiroyoshi Sakurai, Satoshi Takeuchi, Yasuhiro Togano, Takashi Nakamura, Yukie Maeda, Deuk Soon Ahn, Masayuki Aikawa, Shouhei Araki, Sidong Chen, Nobuyuki Chiga, Pieter Doornenbal, Naoki Fukuda, Takashi Ichihara, Tadaaki Isobe, Shunsuke Kawakami, Tadahiro Kin, Yosuke Kondo, Shunpei Koyama, Toshiyuki Kubo, Shigeru Kubono, Meiko Uesaka, Ayano Makinaga, Masafumi Matsushita, Teiichiro Matsuzaki, Shin'ichiro Michimasa, Satoru Momiyama, Shunsuke Nagamine, Megumi Niikura, Tomoyuki Ozaki, Atsumi Saito, Takeshi Saito, Yoshiaki Shiga, Mizuki Shikata, Yohei Shimizu, Susumu Shimoura, Toshiyuki Sumikama, Pär Anders Söderström, Hiroshi Suzuki, Hiroyuki Takeda, Ryo Taniuchi, Jun'ichi Tsubota, Yasushi Watanabe, Kathrin Wimmer, Tatsuya Yamamoto, Koichi Yoshida, Isotope production in proton-, deuteron-, and carbon-induced reactions on Nb 93 at 113 MeV/nucleon, Physical Review C, 10.1103/PhysRevC.100.044605, 100, 4, 2019.10, Isotope-production cross sections for p-, d-, and C-induced spallation reactions on Nb93 at 113 MeV/nucleon were measured using the inverse-kinematics method employing secondary targets of CH2, CD2, and C. The measured cross sections for Mo90, Nb90, Y86,88 produced by p-induced reactions were found to be consistent with those measured by the conventional activation method. We performed benchmark tests of the reaction models INCL-4.6, JQMD, and JQMD-2.0 implemented in the Particle and Heavy Ion Transport code System (PHITS) and of the nuclear data libraries JENDL-4.0/HE, TENDL-2017, and ENDF/B-VIII.0. The model calculations also showed generally good agreement with the measured isotope-production cross sections for p-, d-, and C-induced reactions. It also turns out that, among the three nuclear data libraries, JENDL-4.0/HE provides the best agreement with the measured data for the p-induced reactions. We compared the present Nb93 data with the Zr93 data, that were measured previously by the same inverse kinematics method (Kawase et al., Prog. Theor. Exp. Phys. 2017, 093D03 (2017)2050-391110.1093/ptep/ptx110), with particular attention to the effect of neutron-shell closure on isotope production in p- and d-induced spallation reactions. The isotopic distributions of the measured production cross sections in the Zr93 data showed noticeable jumps at neutron number N=50 in the isotopic chains of ΔZ=0 and -1, whereas no such jump appeared in isotopic chain of ΔZ=0 in the Nb93 data. From INCL-4.6 + GEM calculations, we found that the jump formed in the evaporation process is smeared out by the intranuclear cascade component in Nb91 produced by the Nb93(p,p2n) and (d,d2n) reactions on Nb93. Moreover, for Nb93, the distribution of the element-production cross sections as a function of the change in proton number ΔZ is shifted to smaller ΔZ than for Zr93, because the excited Nb prefragments generated by the cascade process are more likely to emit protons than the excited Zr prefragments, due to the smaller proton-separation energies of the Nb isotopes..
6. T. Kin, J. Goto, M. Oshima, Machine Learning Approach for Gamma-ray Spectra Identification for Radioactivity Analysis, 2019 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2019 2019 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2019, 10.1109/NSS/MIC42101.2019.9059618, 2019.10, We have proposed a machine learning model for efficient gamma-ray spectrometry for environmental recovery from the Fukushima Daiichi Power Plant Accident. In the present study, we focus on a radioactive nuclide identification by the machine learning in a screening measurement. A simple deep neural network having two hidden layer is proposed, and the identification accuracy is achieved more than 95% for single gamma-ray spectra..
7. Masahide Harada, Tadahiro Kin, Recent activities in the field of radiation, accelerator, and beam technologies, journal of nuclear science and technology, 10.1080/00223131.2019.1571955, 56, 3, 261-262, 2019.03, Many of the outstanding researches and developments in the field of radiation, accelerator, and beam technology are published in scientific journals, including the Journal of Nuclear Science and Technology. Some topics from the latest activities in these fields are introduced..
8. Kullapha Chaiwongkhot1, Tadahiro Kin, Ryo Sasaki, Hikaru Sato, Yuta Nagata, Tomohiro Komori, Yukinobu Watanabe, A Feaibility Study of 3D Cosmic-Ray Muon Tomography with a Portable Muography Detector, JPS Conference Proceedings (Proceedings of the Second International Symposium on Radiation Detectors and Their Uses (ISRD2018)) 24, 011010 (2019), https://doi.org/10.7566/JPSCP.24.011010, 24, 011010, 6 pages, 2019.01, The Maximum Likelihood-Expectation Maximization (ML-EM) method was applied to 3D image reconstruction of cosmic-ray muon tomography. The feasibility was examined by using Monte Carlo simulation for a simple configuration where two lead blocks were placed at a different height from a muography detector. The 2D projection of the average thickness of the blocks as a function of the muon direction was simulated for multiple detection positions. The 3D image of the density profile was reconstructed by applying the ML-EM method to the simulated projections. It was found that the image reproduces reasonably well the position of the two blocks. The effect of the limited number of detection positions and the number of iteration in the ML-EM method on the image reconstruction was investigated in detail..
9. Hikaru Sato, Tadahiro Kin, Yukinobu Watanabe, Development of a Detector System for Measurement of Zenith Angular Differential Spectra of Low-Energy Terrestrial Cosmic-Ray Muon, JPS Conference Proceedings (Proceedings of the Second International Symposium on Radiation Detectors and Their Uses (ISRD2018)) 24, 011010 (2019), https://doi.org/10.7566/JPSCP.24.011014, 24, 011014, 6 pages, 2019.01, We have developed a muon detector system consisting of plastic scintillators to measure the energy spectrum of secondary cosmic-ray muons in the low energy range from 15 to 340 MeV. The experiment with the detector system was conducted at Chikushi Campus of Kyushu University in Japan. The measured flux was in good agreement with that measured by Allkofer in 1971 above 300 MeV, while the prediction by EXPACS underestimated the newly measured data as well as the Allkofer’s data in the energy range less than 1 GeV..
10. Tadahiro Kin1, Md. Kawchar Ahmed Patwary, Masaki Kamida, Katsumi Aoki, Naoto Araki, Kosuke Yoshinami, Yukinobu Watanabe, Masatoshi Itoh, Development of Radioisotopes Production Method by Accelerator-Based Neutron: Activity at Kyushu University, JPS Conference Proceedings (Proceedings of the Second International Symposium on Radiation Detectors and Their Uses (ISRD2018)) 24, 011010 (2019), https://doi.org/10.7566/JPSCP.24.011031, 24, 011031, 6 pages, 2019.01, We have studied Radioisotopes (RIs) production by the accelerator-based neutron method with neutrons generated via the (d,n) reaction on C or Be in the incident energy range less than 50 MeV. The study has been conducted by the two approaches: proposal of new production routes or new RIs with the accelerator-based neutron method and systematic measurements of double-differential thick-target neutron yields (DDTTNYs). In the study, we have proposed effective production methods of 64Cu for a new PET RI and 92Y for application of radio immunotherapy. Moreover, the DDTTNYs have been systematically measured by the multiple-foil activation method, and a new unfolding code with artificial neural network was developed for the unfolding process. In the present paper, our research activity and results are reviewed comprehensively to show examples of 64Cu production and a TTNY measurement of C(d,n) reaction at 12-MeV deuteron..
11. Katsumi Aoki, Tadahiro Kin, Masaki Kamida, Naoto Araki, Yukinobu Watanabe, Masatoshi Itoh, Determination of Accelerator-Based Neutron Energy Distribution by Means of Multiple-Foil Activation Method Using GRAVEL, MAXED, and RooUnfold, JPS Conference Proceedings (Proceedings of the Second International Symposium on Radiation Detectors and Their Uses (ISRD2018)) 24, 011010 (2019), https://doi.org/10.7566/JPSCP.24.011033, 24, 011033, 6 pages, 2019.01, A multiple-foil activation method is one of the effective measurement methods of neutron energy distribution. Unfolding processes play an important role in the method. The performance of three unfolding codes, GRAVEL, MAXED, and RooUnfold is compared by using the newly measured data of double-differential thick-target neutron yield (DDTTNY) from the C(d,n) reaction induced by 20-MeV deuteron. The DDTTNYs unfolded by GRAVEL and MAXED show the energy distributions similar to that measured previously by a conventional time of flight (TOF) method, while the DDTTNY unfolded by RooUnfold leads to harder energy distribution than the TOF result..
12. Satoshi Takeuchi, Takashi Nakamura, Mizuki Shikata, Yasuhiro Togano, Yosuke Kondo, Junichi Tsubota, Tomoyuki Ozaki, Atsumi Saito, Hideaki Otsu, He Wang, Hiroyoshi Sakurai, Yukinobu Watanabe, Shoichiro Kawase, Deuk Soon Ahn, Masayuki Aikawa, Takashi Ando, Shohei Araki, Sidong Chen, Nobuyuki Chiga, Pieter Doornenbal, Shuichiro Ebata, Naoki Fukuda, Tadaaki Isobe, Shunsuke Kawakami, Tadahiro Kin, Shunpei Koyama, Shigeru Kubono, Yukie Maeda, Ayano Makinaga, Masafumi Matsushita, Teiichiro Matsuzaki, Shin'ichiro Michimasa, Satoru Momiyama, Shunsuke Nagamine, Keita Nakano, Megumi Niikura, Kazuyuki Ogata, Takeshi Saito, Yoshiaki Shiga, Yohei Shimizu, Susumu Shimoura, Toshiyuki Sumikama, Pär Anders Söderstrom, Hiroshi Suzuki, Hiroyuki Takeda, Ryo Taniuchi, Meiko Uesaka, Yasushi Watanabe, Kathrin Wimmer, Tatsuya Yamamoto, Koichi Yoshida, Coulomb breakup reactions of 93,94 Zr in inverse kinematics, Progress of Theoretical and Experimental Physics, 10.1093/ptep/pty138, 2019, 1, 2019.01, Coulomb breakup reactions of 93,94 Zr have been studied in inverse kinematics at incident beam energies of about 200 MeV/nucleon in order to evaluate neutron capture reaction methods. The 93 Zr(n,γ) 94 Zr reaction is particularly important as a candidate nuclear transmutation reaction for the long-lived fission product 93 Zr in nuclear power plants. One- and two-neutron removal cross sections on Pb and C targets were measured to deduce the inclusive Coulomb breakup cross sections, 375 ± 29 (stat.) ± 30 (syst.) and 403 ± 26 (stat.) ± 31 (syst.) mb for 93 Zr and 94 Zr, respectively. The results are compared with estimates using the standard Lorentzian model and microscopic calculations. The results reveal a possible contribution of the pygmy dipole resonance or giant quadrupole resonance in the Coulomb breakup reactions of 94 Zr..
13. T. Kin, Y. Sanzen, M. Kamida, K. Aoki, N. Araki, Y. Watanabe, Artificial Neural Network for Unfolding Accelerator-based Neutron Spectrum by Means of Multiple-foil Activation Method, 2017 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2017 2017 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2017 - Conference Proceedings, 10.1109/NSSMIC.2017.8532892, 2018.11, In medical radioisotope (RI) production by accelerator neutron, double-differential thick-target neutron yield (DDTTNY) is necessary to be measured to estimate production amount and its radioactive and isotopic purity. We adopted the multiple-foil activation method for the measurement. The DDTTNY should be derived by an unfolding technique from measured numbers of produced atoms via the activation reactions. We have developed an unfolding code using artificial neural network (ANN) which requires no initial guess spectrum and no human-inducible convergence condition which are required for conventional unfolding methods. To demonstrate the ability to derive DDTTNY by the ANN unfolding code, we input numbers of produced atoms obtained by a multiple-foil activation experiment conducted at Kyushu University Tandem Laboratory. The resultant DDTTNY is compared with that by GRAVEL code, which is one of the conventional codes. Since there is no large discrepancy, we found that the ANN unfolding code has same ability to GRAVEL code even no initial guess spectrum was used..
14. Hikaru Sato, Tadahiro Kin, Yukinobu Watanabe, Investigation of Environmental Cosmic-ray Muon Spectrum in Low Energy Region, 2017 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2017 2017 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2017 - Conference Proceedings, 10.1109/NSSMIC.2017.8533050, 2018.11, We have developed a muon detector system consisting of plastic scintillators to measure the secondary cosmic-ray muon energy spectrum in the low energy region from 50 to 130 MeV. The experiment with the detector system was conducted at Chikushi Campus of Kyushu University in Japan. The measured spectrum is in good agreement with the one measured by Allkofer in 1971 in the shape and magnitude, while the prediction by EXPACS underestimates both our measured data and the Allkofer's data..
15. Kullapha Chaiwongkhot, Tadahiro Kin, Hiroaki Ohno, Ryo Sasaki, Yuta Nagata, Kazuhiro Kondo, Yukinobu Watanabe, Development of a portable muography detector for infrastructure degradation investigation, IEEE Transactions on Nuclear Science, 10.1109/TNS.2018.2855737, 65, 8, 2316-2324, 2018.08, A portable muography detector was developed for measuring infrastructure degradation and its performance was tested. The detector consists of two muon position sensitive detectors (mu-PSDs) of the area of 140 mm $\times \,\, 140$ mm, placed in a compact light-shielding box. Each mu-PSD consists of plastic scintillating fibers connected to multipixel photon counters (MPPCs). To suppress the gain deviation of the MPPCs, the box was heat insulated and its inner air temperature was maintained by Peltier cooling-heating modules. The mu-PSD pixel size was 8.75 mm $\times \,\, 8.75$ mm and the distance between the two mu-PSDs was set to 100 mm in order to achieve a solid angle resolution of 8 msr when measuring typical pieces of infrastructure at thicknesses of several tens of centimeters. The intensity of cosmic-ray muons was measured as a function of zenith angle on the ground and was found to be in good agreement with the well-known empirical formula for muon intensity at Earth's surface. The structural interior of a seven-story concrete building was then successfully imaged with the muography detector placed in the building's basement..
16. Wang Liao, Masanori Hashimoto, Seiya Manabe, Yukinobu Watanabe, Shin Ichiro Abe, Keita Nakano, Hikaru Sato, Tadahiro Kin, Koji Hamada, Motonobu Tampo, Yasuhiro Miyake, Measurement and mechanism investigation of negative and positive muon-induced upsets in 65-nm Bulk SRAMs, IEEE Transactions on Nuclear Science, 10.1109/TNS.2018.2825469, 65, 8, 1734-1741, 2018.08, Irradiation experiments of positive and negative muon were conducted for 65-nm bulk CMOS static random-access memory. The experimental results reveal that parasitic bipolar action (PBA) contributes to negative muon-induced upsets. We observe an increase in single event upset (SEU) cross section at higher operation voltage under negative muon irradiation while positive muon shows an opposite decreasing tendency. Also, the proportion of multiple-cell upset (MCU) events to all the negative muon-induced upset events is up to 66, and more than a 20-bit MCU is observed. Furthermore, Monte Carlo simulation of particle and heavy ion transport code system (PHITS) is performed for explaining the difference in SEU between positive and negative muons. We also discuss the charge threshold that triggers PBA-induced MCU using measurement and simulation results with different momentum muons. The estimated threshold is much larger than the charge that the positive muons can deposit, which well explains that no PBA-induced MCUs are observed under positive muon irradiation..
17. Seiya Manabe, Yukinobu Watanabe, Wang Liao, Masanori Hashimoto, Keita Nakano, Hikaru Sato, Tadahiro Kin, Shin-ichiro Abe, Koji Hamada, Motonobu Tampo, Yasuhiro Miyake, Negative and Positive Muon-Induced Single Event Upsets in 65-nm UTBB SOI SRAMs, IEEE Transaction on Nuclear Science, 10.1109/TNS.2018.2839704, 2018.05, We have performed an irradiation test of low-energy positive and negative muons on 65-nm ultra-thin body and thin buried oxide silicon-on-insulator (UTBB-SOI) SRAMs. The SEU cross sections were measured systematically as a function of incident muon momentum and operating supply voltage. The experimental results show that the negative muon SEUs occur at about three times higher rate than the positive muon ones at the supply voltage of 0.5 V when the incident muons stop near the sensitive volume. A Monte Carlo simulation with the Particle and Heavy Ion Transport code System (PHITS) was carried out using a simple sensitive volume (SV) model. The simulation based on the PHITS using the SV model (PHITS-SV) is found to reproduce generally well the momentum dependence of the measured SEU cross sections for both positive and negative muons. From the simulation, the charged particles and secondary ions having significant influence on SEUs are specified and the differences between negative and positive muons are discussed..
18. Yu Watanabe, J. Suwa, K. Nakano, S. Kawase, H. Wang, H. Otsu, H. Sakurai, D. S. Ahn, M. Aikawa, T. Ando, S. Araki, S. Chen, N. Chiga, P. Doornenbal, N. Fukuda, T. Isobe, S. Kawakami, T. Kin, Y. Kondo, S. Koyama, S. Kubono, Y. Maeda, A. Makinaga, M. Matsushita, T. Matsuzaki, S. Michimasa, S. Momiyama, S. Nagamine, T. Nakamura, M. Niikura, T. Ozaki, A. Saito, T. Saito, Y. Shiga, M. Shikata, Y. Shimizu, S. Shimoura, T. Sumikama, P. A. Soderstrom, H. Suzuki, H. Takeda, S. Takeuchi, R. Taniuchi, Y. Togano, J. Tsubota, M. Uesaka, Ya Watanabe, K. Wimmer, T. Yamamoto, K. Yoshida, Isotopic production cross sections of residual nuclei in proton- And deuteron-induced reactions on 91,92Y, 92,93Zr, and 93,94Nb around 100 MeV/nucleon, 15th International Conference on Nuclear Reaction Mechanisms, NRM 2018 Proceedings of the 15th International Conference on Nuclear Reaction Mechanisms, NRM 2018, 139-143, 2018.01, Production cross sections of residual nuclei via proton- and deuteron-induced spallation reactions on 91,92Y, 92,93Zr, and 93,94Nb at projectile energies around 100 MeV/nucleon were measured in inverse kinematics at the RIKEN Radioactive Isotope Beam Factory. Noticeable jumps in the measured cross sections of isotone production appear between the neutron numbers N=51 and 50 for target nuclei with the initial neutron number Ninit=53 (92Y, 93Zr, and 94Nb), while such jump is not clearly seen for target nuclei with Ninit=52 (91Y, 92Zr, and 93Nb). The measured isotopic production cross sections are compared with PHITS calculations considering both the intranuclear cascade and evaporation processes in order to benchmark the reaction models..
19. Kullapha Chaiwongkhot, Tadahiro Kin, Hiroaki Ohno, Kazuhiro Kondo, Hikaru Sato, Yukinobu Watanabe, Development of a prototype portable muography detector for exploration of underground cavities, 2016 IEEE Nuclear Science Symposium, Medical Imaging Conference and Room-Temperature Semiconductor Detector Workshop, NSS/MIC/RTSD 2016 2016 IEEE Nuclear Science Symposium, Medical Imaging Conference and Room-Temperature Semiconductor Detector Workshop, NSS/MIC/RTSD 2016, 10.1109/NSSMIC.2016.8069889, 2017.10, A prototype portable muography detector was developed for exploration of underground cavities and some performance tests were conducted. The detector consists of two muon position sensitive detectors (mu-PSDs) having an area size of 140 mm x 140 mm which were placed in a compact light shielding box. Each mu-PSD was fabricated using plastic scintillating fibers (PSFs) connected to multi-pixel photon counters (MPPCs). The pixel size of 8.75 mm x 8.75 mm and the distance of 100 mm between the two mu-PSDs were determined so as to satisfy the solid angle resolution of 30 msr required from subsidence risk cavity exploration. The detector system worked stably by using a Peltier cooling and heating module for temperature control function. An imaging test of interior structure of a seven-story concrete building was successfully performed using the muography detector placed on the basement..
20. Tadahiro Kin, Takaya Kawagoe, Shouhei Araki, Yukinobu Watanabe, Production of high-purity medical radio isotope 64Cu with accelerator-based neutrons generated with 9 and 12 MeV deuterons, journal of nuclear science and technology, 10.1080/00223131.2017.1344585, 54, 10, 1123-1130, 2017.10, We conducted a feasibility study for producing a high-purity medical radioisotope 64Cu from natural zinc with accelerator-based neutrons. 64Cu isotopes were produced via the 64Zn(n,p) reaction. The accelerator-based neutrons were generated via the C(d,n) reaction using low-energy deuterons of 9 and 12 MeV on a 1-mm-thick carbon target. First, the production purity was estimated using the evaluated nuclear data library JENDL-4.0 and our previously measured thick target neutron yield. We found that even when natural zinc was used as the starting material, significantly high-purity 64Cu could be obtained. Next, irradiation experiments for producing 64Cu using natural zinc were conducted at Kyushu University Tandem Laboratory, with the amounts of 64Cu isotopes and other gamma-emission nuclides measured by a high-purity germanium detector. As a result, high-purity 64Cu isotopes of 1.11(49) × 100 and 3.70 (17) × 100 Bq/g/C were produced with incident deuteron energies of 9 and 12 MeV, respectively..
21. Shoichiro Kawase, Keita Nakano, Yukinobu Watanabe, He Wang, Hideaki Otsu, Hiroyoshi Sakurai, Deuk Soon Ahn, Masayuki Aikawa, Takashi Ando, Shouhei Araki, Sidong Chen, Nobuyuki Chiga, Pieter Doornenbal, Naoki Fukuda, Tadaaki Isobe, Shunsuke Kawakami, Tadahiro Kin, Yosuke Kondo, Shunpei Koyama, Shigeru Kubono, Yukie Maeda, Ayano Makinaga, Masafumi Matsushita, Teiichiro Matsuzaki, Shin'ichiro Michimasa, Satoru Momiyama, Shunsuke Nagamine, Takashi Nakamura, Megumi Niikura, Tomoyuki Ozaki, Atsumi Saito, Takeshi Saito, Yoshiaki Shiga, Mizuki Shikata, Yohei Shimizu, Susumu Shimoura, Toshiyuki Sumikama, Pär-Anders Söderström, Hiroshi Suzuki, Hiroyuki Takeda, Satoshi Takeuchi, Ryo Taniuchi, Yasuhiro Togano, Jun'ichi Tsubota, Meiko Uesaka, Yasushi Watanabe, Kathrin Wimmer, Tatsuya Yamamoto, Koichi Yoshida, Study of proton- and deuteron-induced spallation reactions on the long-lived fission product 93Zr at 105 MeV/nucleon in inverse kinematics, Progress of Theoretical and Experimental Physics, 10.1093/ptep/ptx110, 2017, 9, 093D03, 2017.09, Spallation reactions for the long-lived fission product 93Zr have been studied in order to provide basic data necessary for nuclear waste transmutation. Isotopic-production cross sections via proton- and deuteron-induced spallation reactions on 93Zr at 105 MeV/nucleon were measured in inverse kinematics at the RIKEN Radioactive Isotope Beam Factory. Remarkable jumps in isotopic production originating from the neutron magic number N=50 were observed in Zr and Y isotopes. The experimental results were compared to the PHITS calculations considering both the intranuclear cascade and evaporation processes, and the calculations greatly overestimated the measured production yield, corresponding to few-nucleon-removal reactions. The present data suggest that the spallation reaction is a potential candidate for the treatment of 93Zr in spent nuclear fuel..
22. Shoichiro Kawase, Ygbrinobu Watanabe, He Wang, Hideaki Otsu, Hiroyoshi Sakurai, Satoshi Takeuchi, Yasuhiro Togano, Takashi Nakamura, Ygbrie Maeda, Degbr Soon Ahn, Masaygbri Aikawa, Shouhei Araki, Sidong Chen, Nobuygbri Chiga, Pieter Doornenbal, Naoki FGBRuda, Takashi Ichihara, Tadaaki Isobe, Shunsgbre Kawakami, Tadahiro Kin, Yosgbre Kondo, Shunpei Koyama, Toshiygbri Kubo, Shigeru Kubono, Meiko Kurokawa, Ayano Makinaga, Masafumi Matsushita, Teiichiro Matsuzaki, Shin'Ichiro Michimasa, Satoru Momiyama, Shunsgbre Nagamine, Keita Nakano, Megumi Niikura, Tomoygbri Ozaki, Atsumi Saito, Takeshi Saito, Yoshiaki Shiga, Mizgbri Shikata, Yohei Shimizu, Susumu Shimoura, Toshiygbri Sumikama, Pär Anders Söderström, Hiroshi SuzGBRi, Hiroygbri Takeda, Ryo Taniuchi, Jun'Ichi Tsubota, Yasushi Watanabe, Kathrin Wimmer, Tatsuya Yamamoto, Koichi Yoshida, Cross section measurement of residues produced in proton-and deuteron-induced spallation reactions on 93Zr at 105 MeV/u using the inverse kinematics method, 2016 International Conference on Nuclear Data for Science and Technology, ND 2016 ND 2016 International Conference on Nuclear Data for Science and Technology, 10.1051/epjconf/201714603012, 2017.09, Isotopic production cross sections in the proton-and deuteron-induced spallation reactions on 93Zr at an energy of 105 MeV/u were measured in inverse kinematics conditions for the development of realistic nuclear transmutation processes for long-lived fission products (LLFPs) with neutron and light-ion beams. The experimental results were compared to the PHITS calculations describing the intra-nuclear cascade and evaporation processes. Although an overall agreement was obtained, a large overestimation of the production cross sections for the removal of a few nucleons was seen. A clear shell effect associated with the neutron magic number N = 50 was observed in the measured isotopic production yields of Zr and Y isotopes, which can be reproduced reasonably by the PHITS calculation..
23. Keita Nakano, Yukinobu Watanabe, Shoichiro Kawase, He Wang, Hideaki Otsu, Hiroyoshi Sakurai, Satoshi Takeuchi, Yasuhiro Togano, Takashi Nakamura, Yukie Maeda, Deuk Soon Ahn, Masayuki Aikawa, Shouhei Araki, Sidong Chen, Nobuyuki Chiga, Pieter Doornenbal, Naoki Fukuda, Takashi Ichihara, Tadaaki Isobe, Shunsuke Kawakami, Tadahiro Kin, Yosuke Kondo, Shunpei Koyama, Toshiyuki Kubo, Shigeru Kubono, Meiko Kurokawa, Ayano Makinaga, Masafumi Matsushita, Teiichiro Matsuzaki, Shin'Ichiro Michimasa, Satoru Momiyama, Shunsuke Nagamine, Megumi Niikura, Tomoyuki Ozaki, Atsumi Saito, Takeshi Saito, Yoshiaki Shiga, Mizuki Shikata, Yohei Shimizu, Susumu Shimoura, Toshiyuki Sumikama, Pär Anders Söderström, Hiroshi Suzuki, Hiroyuki Takeda, Ryo Taniuchi, Jun'Ichi Tsubota, Yasushi Watanabe, Kathrin Wimmer, Tatsuya Yamamoto, Koichi Yoshida, Cross sections for nuclide production in proton- and deuteron-induced reactions on 93Nb measured using the inverse kinematics method, 2016 International Conference on Nuclear Data for Science and Technology, ND 2016 ND 2016 International Conference on Nuclear Data for Science and Technology, 10.1051/epjconf/201714611046, 2017.09, Isotopic production cross sections were measured for proton- and deuteron-induced reactions on 93Nb by means of the inverse kinematics method at RIKEN Radioactive Isotope Beam Factory. The measured production cross sections of residual nuclei in the reaction 93Nb + p at 113 MeV/u were compared with previous data measured by the conventional activation method in the proton energy range between 46 and 249 MeV. The present inverse kinematics data of four reaction products (90Mo, 90Nb, 88Y, and 86Y) were in good agreement with the data of activation measurement. Also, the model calculations with PHITS describing the intra-nuclear cascade and evaporation processes generally well reproduced the measured isotopic production cross sections..
24. Ygbrinobu Watanabe, Tadahiro Kin, Shouhei Araki, Shinsgbre Nakayama, Osamu Iwamoto, Deuteron nuclear data for the design of accelerator-based neutron sources
Measurement, model analysis, evaluation, and application, 2016 International Conference on Nuclear Data for Science and Technology, ND 2016 ND 2016 International Conference on Nuclear Data for Science and Technology, 10.1051/epjconf/201714603006, 2017.09, A comprehensive research program on deuteron nuclear data motivated by development of accelerator-based neutron sources is being executed. It is composed of measurements of neutron and gamma-ray yields and production cross sections, modelling of deuteron-induced reactions and code development, nuclear data evaluation and benchmark test, and its application to medical radioisotopes production. The goal of this program is to develop a state-of-the-art deuteron nuclear data library up to 200 MeV which will be useful for the design of future (d,xn) neutron sources. The current status and future plan are reviewed..
25. Shouhei Araki, Yukinobu Watanabe, Mizuki Kitajima, Hiroki Sadamatsu, Keita Nakano, Tadahiro Kin, Yosuke Iwamoto, Daiki Satoh, Masayuki Hagiwara, Hiroshi Yashima, Tatsushi Shima, Neutron production in deuteron-induced reactions on Li, Be, and C at an incident energy of 102 MeV, 2016 International Conference on Nuclear Data for Science and Technology, ND 2016 ND 2016 International Conference on Nuclear Data for Science and Technology, 10.1051/epjconf/201714611027, 2017.09, Double-differential cross sections (DDXs) of deuteron-induced neutron production reactions on Li, Be, and C at 102MeV were measured at forward angles (= 25?) by means of a time of flight method with NE213 liquid organic scintillators at the Research Center of Nuclear Physics, Osaka University. The experimental results were compared with model calculations with PHITS and DEURACS. The DEURACS calculation reproduces the experimental DDXs for C at very forward angles than the PHITS one. Moreover, the incident energy dependence of the Li(d,xn) reaction was investigated by adding the DDX data measured previously at 25 and 40MeV..
26. Tadahiro Kin, Yukimasa Sanzen, Masaki Kamida, Yukinobu Watanabe, Masatoshi Itoh, Production of 92Y via the 92Zr(n, p) reaction using the C(d, n) accelerator neutron source, 2016 International Conference on Nuclear Data for Science and Technology, ND 2016 ND 2016 International Conference on Nuclear Data for Science and Technology, 10.1051/epjconf/201714608009, 146, 2017.09, We have proposed a new method of producing medical radioisotope 92Y as a candidate of alternatives of 111In bioscan prior to 90Y ibritumomab tiuxetan treatment. The 92Y isotope is produced via the 92Zr (n,p) reaction using accelerator neutrons generated by the interaction of deuteron beams with carbon. A feasibility experiment was performed at Cyclotron and Radioisotope Center, Tohoku University. A carbon thick target was irradiated by 20-MeV deuterons to produce accelerator neutrons. The thick target neutron yield (TTNY) was measured by using the multiple foils activation method. The foils were made of Al, Fe, Co, Ni, Zn, Zr, Nb, and Au. The production amount of 92Y and induced impurities were estimated by simulation with the measured TTNY and the JENDL-4.0 nuclear data..
27. He Wang, Hideaki Otsu, Hiroyoshi Sakurai, Deuksoon Ahn, Masayuki Aikawa, Takashi Ando, Shouhei Araki, Sidong Chen, Nobuyuki Chiga, Pieter Doornenbal, Naoki Fukuda, Tadaaki Isobe, Shunsuke Kawakami, Shoichiro Kawase, Tadahiro Kin, Yosuke Kondo, Shupei Koyama, Shigeru Kubono, Yukie Maeda, Ayano Makinaga, Masafumi Matsushita, Teiichiro Matsuzaki, Shinichiro Michimasa, Satoru Momiyama, Shunsuke Nagamine, Takashi Nakamura, Keita Nakano, Megumi Niikura, Tomoyuki Ozaki, Atsumi Saito, Takeshi Saito, Yoshiaki Shiga, Mizuki Shikata, Yohei Shimizu, Susumu Shimoura, Toshiyuki Sumikama, Pär Anders Söderström, Hiroshi Suzuki, Hiroyuki Takeda, Satoshi Takeuchi, Ryo Taniuchi, Yasuhiro Togano, Junichi Tsubota, Meiko Uesaka, Yasushi Watanabe, Yukinobu Watanabe, Kathrin Wimmer, Tatsuya Yamamoto, Koichi Yoshida, Spallation reaction study for fission products in nuclear waste
Cross section measurements for 137Cs, 90Sr and 107Pd on proton and deuteron, 2016 International Conference on Nuclear Data for Science and Technology, ND 2016 ND 2016 International Conference on Nuclear Data for Science and Technology, 10.1051/epjconf/201714609022, 2017.09, Spallation reactions for the long-lived fission products 137Cs, 90Sr and 107Pd have been studied for the purpose of nuclear waste transmutation. The cross sections on the proton- and deuteron-induced spallation were obtained in inverse kinematics at the RIKEN Radioactive Isotope Beam Factory. Both the target and energy dependences of cross sections have been investigated systematically. and the cross-section differences between the proton and deuteron are found to be larger for lighter fragments. The experimental data are compared with the SPACS semi-empirical parameterization and the PHITS calculations including both the intra-nuclear cascade and evaporation processes..
28. Masahiko Sugawara, Yosuke Toh, Mitsuo Koizumi, Masumi Oshima, Atsushi Kimura, Tadahiro KIN, Yuichi Hatsukawa, H. Kusakari, Intermediate-spin states of 92Zr and a large B(E2) value between the 10_1+ and 8_1+ states, Physical Review C, https://doi.org/10.1103/PhysRevC.96.024314, 96, 024314, 2017.08, This study investigated intermediate-spin states of 92Zr via the inverse reaction 9Be(86Kr,3n) 92Zr.
Seven transitions were newly observed, and a lifetime was extracted for the 10_1+ state by analysis of Doppler-broadened line shapes of decay γ rays.
A largeB(E2) value was obtained for the transition from 10_1+ to 8_1+, and the magnitude was comparable to that for the deformed excited configurations in 94Zr that have recently been established.
A possible origin for such collectivity is discussed qualitatively based on a phenomenological deformed rotor model.
Moreover, a multipletlike structure that fits into the systematics for N = 52 even-A isotones is revealed for the negative-parity yrast states..
29. M. Sugawara, Y. Toh, M. Koizumi, M. Oshima, A. Kimura, Tadahiro Kin, Y. Hatsukawa, H. Kusakari, Intermediate-spin states of 92 Zr and a large B(E2) value between the 101+ and 81+ states, Physical Review C, 10.1103/PhysRevC.96.024314, 96, 2, 2017.08, This study investigated intermediate-spin states of Zr92 via the inverse reaction Be9(Kr,3n86)Zr92. Seven transitions were newly observed, and a lifetime was extracted for the 101+ state by analysis of Doppler-broadened line shapes of decay γ rays. A large B(E2) value was obtained for the transition from 101+ to 81+, and the magnitude was comparable to that for the deformed excited configurations in Zr94 that have recently been established. A possible origin for such collectivity is discussed qualitatively based on a phenomenological deformed rotor model. Moreover, a multipletlike structure that fits into the systematics for N=52 even-A isotones is revealed for the negative-parity yrast states..
30. Tadahiro KIN, Takaya Kawagoe, Shouhei Araki, Yukinobu Watanabe, Production of high-purity medical radio isotope 64Cu with accelerator-based neutrons generated with 9 and 12 MeV deuterons, Journal of Nuclear Science and Technology, http://dx.doi.org/10.1080/00223131.2017.1344585, 54, 10, 1123-1130, 2017.07, We conducted a feasibility study for producing a high-purity medical radioisotope 64Cu from natural zinc with accelerator-based neutrons. 64Cu isotopes were produced via the 64Zn(n,p) reaction. The accelerator-based neutrons were generated via the C(d,n) reaction using low-energy deuterons of 9 and 12 MeV on a 1-mm-thick carbon target. First, the production purity was estimated using the evaluated nuclear data library JENDL-4.0 and our previously measured thick target neutron yield. We found that even when natural zinc was used as the starting material, significantly high-purity 64Cu could be obtained. Next, irradiation experiments for producing 64Cu using natural zinc were conducted at Kyushu University Tandem Laboratory, with the amounts of 64Cu isotopes and other gamma-emission nuclides measured by a high-purity germanium detector. As a result, high-purity 64Cu isotopes of 1.11(49) × 100 and 3.70 (17) × 100 Bq/g/uC were produced with incident deuteron energies of 9 and 12 MeV, respectively..
31. He Wang, Hideaki Otsu, Hiroyoshi Sakurai, Deuksoon Ahn, Masayuki Aikawa, Takashi Ando, Shouhei Araki, Sidong Chen, Nobuyuki Chiga, Pieter Doornenbal, Naoki Fukuda, Tadaaki Isobe, Shunsuke Kawakami, Shoichiro Kawase, Tadahiro Kin, Yosuke Kondo, Shunpei Koyama, Shigeru Kubono, Yukie Maeda, Ayano Makinaga, Masafumi Matsushita, Teiichiro Matsuzaki, Shin'Ichiro Michimasa, Satoru Momiyama, Shunsuke Nagamine, Takashi Nakamura, Keita Nakano, Megumi Niikura, Tomoyuki Ozaki, Atsumi Saito, Takeshi Saito, Yoshiaki Shiga, Mizuki Shikata, Yohei Shimizu, Susumu Shimoura, Toshiyuki Sumikama, Pär Anders Söderström, Hiroshi Suzuki, Hiroyuki Takeda, Satoshi Takeuchi, Ryo Taniuchi, Yasuhiro Togano, Junichi Tsubota, Meiko Uesaka, Yasushi Watanabe, Yukinobu Watanabe, Kathrin Wimmer, Tatsuya Yamamoto, Koichi Yoshida, Spallation reaction study for the long-lived fission product 107Pd, Progress of Theoretical and Experimental Physics, 10.1093/ptep/ptw187, 2017, 2, 2017.02, Spallation reactions for the long-lived fission product 107Pd have been studied for the purpose of nuclear waste transmutation. The cross sections on the proton- and deuteron-induced spallation were obtained at 196 and 118 MeV/nucleon in inverse kinematics at the RIKEN Radioactive Isotope Beam Factory. Both the target and energy dependences of cross sections have been investigated systematically. It was found that the proton-induced cross sections at 196 MeV/nucleon are close to those for deuteron obtained at 118 MeV/nucleon for the light-mass products. The experimental data are compared with the SPACS semi-empirical parameterization and the PHITS calculations including both the intranuclear cascade and evaporation processes. Our data give a design goal of proton/deuteron flux for the transmutation of 107Pd using the spallation reaction. In addition, it is found that the spallation reaction at 118 MeV/nucleon may have an advantage over the 107Pd transmutation because of the low production of other long-lived radioactive isotopes..
32. He Wang, Hideaki Otsu, Hiroyoshi Sakurai, Deuksoon Ahn, Nobuyuki Chiga, Pieter Doornenbal, Naoki Fukuda, Tadaaki Isobe, Toshiyuki Kubo, Shigeru Kubono, Giusseppe Lorusso, Pär Anders Söderström, Hiroshi Suzuki, Hiroyuki Takeda, Yasushi Watanabe, Koichi Yoshida, Teiichiro Matsuzaki, Yohei Shimizu, Toshiyuki Sumikama, Meiko Uesaka, Shoichiro Kawase, Keita Nakano, Yukinobu Watanabe, Shouhei Araki, Tadahiro Kin, Satoshi Takeuchi, Yasuhiro Togano, Takashi Nakamura, Yosuke Kondo, Tomoyuki Ozaki, Atsumi Saito, Junichi Tsubota, Masayuki Aikawa, Ayano Makinaga, Takashi Ando, Shunpei Koyama, Satoru Momiyama, Shunsuke Nagamine, Megumi Niikura, Takeshi Saito, Ryo Taniuchi, Kathrin Wimmer, Shunsuke Kawakami, Yukie Maeda, Tatsuya Yamamoto, Yoshiaki Shiga, Masafumi Matsushita, Shin'Ichiro Michimasa, Susumu Shimoura, Spallation reaction study for the long-lived fission products in nuclear waste
Cross section measurements for 137Cs, 90Sr and 107Pd using inverse kinematics method, 5th International Symposium on Innovative Nuclear Energy Systems, INES-5 2016 Energy Procedia, 10.1016/j.egypro.2017.09.434, 131, 127-132, 2017.01, Spallation reaction study has been performed for the long-lived fission products 137Cs, 90Sr and 107Pd. Isotopic cross sections on proton and deuteron were obtained by using the inverse kinematics technique at the RIKEN Radioactive Isotope Beam Factory. It was found that the deuteron-induced cross sections are larger than the proton-induced ones for the light-mass products. The experimental data were compared with the SPACS semi-empirical parameterization and a theoretical calculation including both the intra-nuclear cascade and evaporation models by the PHITS transport code. It was found that the spallation reaction could be a promising mechanism for the transmutation of 137Cs and 90Sr due to the large total cross section..
33. Shouhei Araki, Yukinobu Watanabe, Mizuki Kitajima, Hiroki Sadamatsu, Keita Nakano, Tadahiro Kin, Yosuke Iwamoto, Daiki Satoh, Masayuki Hagiwara, Hiroshi Yashima, Tatsushi Shima, Systematic measurement of double-differential neutron production cross sections for deuteron-induced reactions at an incident energy of 102 MeV, Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 10.1016/j.nima.2016.10.043, 842, 62-70, 2017.01, Double-differential neutron production cross sections (DDXs) for deuteron-induced reactions on Li, Be, C, Al, Cu, and Nb at 102 MeV were measured at forward angles ≤25° by means of a time of flight (TOF) method with NE213 liquid organic scintillators at the Research Center of Nuclear Physics (RCNP), Osaka University. The experimental DDXs and energy-integrated cross sections were compared with TENDL-2015 data and Particle and Heavy Ion Transport code System (PHITS) calculation using a combination of the KUROTAMA model, the Liege Intra-Nuclear Cascade model, and the generalized evaporation model. The PHITS calculation showed better agreement with the experimental results than TENDL-2015 for all target nuclei, although the shape of the broad peak around 50 MeV was not satisfactorily reproduced by the PHITS calculation..
34. Tadahiro KIN, Kullapha Chaiwongkhot, Hiroaki Ohno, Kazuhiro Kondo, Yukinobu Watanabe, Measurement of Zenith and Azimuth Angular Differential Flux of Cosmic-ray Muons Using a Prototype Portable Muography Detector, JPS Conference Proceedings, http://dx.doi.org/10.7566/JPSCP.11.070006, 11, 070006, 6 pages, 2016.11, We have developed a prototype portable muography detector and applied it to measurement of zenith and azimuth angular differential fluxes of cosmic-ray muons on the ground. The detector system was operated stably and the obtained angular fluxes were consistent with the well-known ones. This result demonstrated that the prototype detector has basic performance for muography after careful realignment..
35. Tadahiro Kin, Yukinobu Watanabe, Development of a remote and multipoint air-dose rate monitoring system using webcams, 2015 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2015 2015 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2015, 10.1109/NSSMIC.2015.7581746, 2016.10, We proposed a new webcam-based air-dose rate monitoring system, in which multiple webcams are driven remotely by a single PC. A CMOS image sensor in a webcam can detect not only visible light but also ionizing radiation. Covering the lens with light shield, we can observe radiation events. Gamma-ray event rates are well used for conventional measurements of air-dose rates. The event rates in units of cpm should be converted into the air-dose rates in units of μSv/h. The conversion function was determined through measurements using a 137Cs standard gamma-ray source. To demonstrate the webcam-based monitoring system under real radiation environment, we developed monitoring software for single webcam and performed a test experiment at an irradiation room of the Kyushu University Tandem Laboratory. As a result, we confirmed that the temporal variation of the monitored air-dose rate was consistent with that of the beam current measured by a Faraday cup..
36. Takaya Kawagoe, Tadahiro KIN, Shouhei Araki, Yukinobu Watanabe, Measurement of neutron yield by multiple-foil activation unfolding method for medical radioisotopes production using accelerator neutrons, the 2014 Symposium on Nuclear Data, http://dx.doi.org/10.11484/jaea-conf-2015-003, JAEA-Conf 2015-003, 297-302, 2016.03, We measured the angle-differential TTNYs of the C(d,n) reaction at Ed = 12 MeV using multiple-foil activation unfolding method. The spectral shape was in good agreement with previous experimental data..
37. Yosuke Iwamoto, Masayuki Hagiwara, Daiki Satoh, Shouhei Araki, Hiroshi Yashima, Tatsuhiko Sato, Akihiko Masuda, Tetsuro Matsumoto, Noriaki Nakao, Tatsushi Shima, Tadahiro Kin, Yukinobu Watanabe, Hiroshi Iwase, Takashi Nakamura, Characterization of high-energy quasi-monoenergetic neutron energy spectra and ambient dose equivalents of 80-389 MeV 7Li(p,n) reactions using a time-of-flight method, Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 10.1016/j.nima.2015.09.045, 804, 50-58, 2015.12, We completed a series of measurements on mono-energetic neutron energy spectra of the 7Li(p,n) reaction with 80-389-MeV protons in the 100-m time-of-flight (TOF) tunnel at the Research Center for Nuclear Physics cyclotron facility. For that purpose, we measured neutron energy spectra of the 80-, 100- and 296-MeV proton incident reactions, which had not been investigated in our previous studies. The neutron peak intensity was 0.9-1.1×1010 neutrons/sr/μC in the incident proton energy region of 80-389 MeV, and it was almost independent of the incident proton energy. The contribution of peak intensity of the spectrum to the total intensity integrated with energies above 3 MeV varied between 0.38 and 0.48 in the incident proton energy range of 80-389 MeV. To consider the correction required to derive a response in the peak region from the measured total responses of neutron monitors in the 100-m TOF tunnel, we proposed the subtraction method using energy spectra between 0° and 25°. The normalizing factor k against 25° neutron fluence to equalize it to 0° neutron fluence in the continuum region ranges from 0.74 to 1.02 depending on the incident proton energy and angle measured. Even without the TOF method, the subtraction method with the k factor almost decreases the response in the continuum region of a neutron spectrum against the total response of neutron monitors..
38. Tadahiro KIN, Yukinobu Watanabe, Development of a Remote and Multipoint Air-dose Rate Monitoring System Using Webcams, 2015 IEEE Nuclear Science Symposium and Medical Imaging Conference, 3 pages, 2015.11, We propose a new webcam-based air-dose rate monitoring system, in which multiple webcams are driven remotely by a single PC..
39. Yosuke Iwamoto, Masayuki Hagiwara, Daiki Satoh, Shouhei Araki, Hiroshi Yashima, Tatsuhiko Sato, Akihiko Masuda, Tetsuro Matsumoto, Noriaki Nakao, Tatsushi Shima, Tadahiro KIN, Yukinobu Watanabe, Hiroshi Iwase, Takashi Nakamura, Characterizationofhigh-energyquasi-monoenergeticneutronenergy spectraandambientdoseequivalentsof80–389 MeV 7Li(p,n) reactions using atime-of-flight method, Nuclear Instruments and Methods in Physics Research A, http://dx.doi.org/10.1016/j.nima.2015.09.045, 804, 50-58, 2015.09.
40. Shouhei Araki, Yukinobu Watanabe, Tadahiro KIN, Nobuhiro Shigyo, Kenshi Sagara, Measurement of Double Differential Neutron Yields from Thick Aluminum Target Irradiated by 9 MeV Deuteron, Energy Procedia, 71, 197-204, 2015.05, Double differential neutron yields from a thick aluminum target irradiated by 9 MeV deuterons were measured at the Kyushu University Tandem accelerator Laboratory (KUTL)..
41. Shouhei Araki, Yukinobu Watanabe, Tadahiro Kin, Nobuhiro Shigyo, Kenshi Sagara, Measurement of Double Differential Neutron Yields from Thick Aluminum Target Irradiated by 9 MeV Deuteron, 4th International Symposium on Innovative Nuclear Energy Systems, INES 2013 Energy Procedia, 10.1016/j.egypro.2014.11.870, 71, 197-204, 2015.05, Double differential neutron yields from a thick aluminum target irradiated by 9 MeV deuterons were measured at the Kyushu University Tandem accelerator Laboratory (KUTL). An NE213 liquid organic scintillator (50.4 mm thick and 50.4 mm in diameter) was used as a neutron detector. Neutron yields from the target were measured at nine angles between 0° and 140°. The neutron energy spectra were obtained by means of an unfolding method using FORIST code with the response function of the NE213 scintillator calculated by SCINFUL-QMD code. The experimental result was compared with other measured data at 5 and 40 MeV and the calculation based on intra-nuclear cascade of Liège (INCL) model in PHITS code..
42. Yukinobu Watanabe, Shinsuke Nakayama, Shouhei Araki, Tadahiro KIN, Study of Deuteron-induced Reactions for Engineering Design of Accelerator-driven Neutron Sources, JAEA-Conf, 2014-002, 44-50, 2015.02.
43. S. Nakamura, A. Kimura, M. Ohta, T. Fujii, S. Fukutani, K. Furutaka, S. Goko, H. Harada, K. Hirose, J. Hori, M. Igashira, T. Kamiyama, T. Katabuchi, T. Kin, K. Kino, F. Kitatani, Y. Kiyanagi, M. Koizumi, M. Mizumoto, M. Oshima, K. Takamiya, Y. Toh, H. Yamana, Precise measurements of neutron capture cross sections for LLFPS and MAs, Nuclear Back-End and Transmutation Technology for Waste Disposal Beyond the Fukushima Accident, 10.1007/978-4-431-55111-9_5, 39-46, 2015.01, To evaluate the feasibility of development of nuclear transmutation technology and an advanced nuclear system, precise nuclear data of neutron capture cross sections for long-lived fission products (LLFPs) and minor actinides (MAs) are indispensable. In this chapter, we present our research activities for the measurements of neutron capture cross sections for LLFPs and MAs..
44. Nozomi Sato, Kazuaki Tsukada, Satoshi Watanabe, Noriko S. Ishioka, Masako Kawabata, Hideya Saeki, Yasuki Nagai, Tadahiro KIN, Futoshi Minato, Nobuyuki Iwamoto, Osamu Iwamoto, First Measurement of the Radionuclide Purity of the Therapeutic Isotope 67Cu Produced by 68Zn(n,x) Reaction Using natC(d,n) Neutrons, Journal of the Physical Society of Japan, http://dx.doi.org/10.7566/JPSJ.83.073201, 83, 073201, 2014.07, We have for the first time studied the radionuclide purity of the therapeutic isotope 67Cu produced by the 68Zn(n,x)67Cu reaction. The neutrons were obtained by the natC(d,n) reaction using 40 MeV deuterons. We measured the γ-ray spectra of the reaction products produced by bombarding an enriched 68ZnO sample with the neutrons with a high-purity Ge detector. We found that the relative production yields of the impurity radionuclides 64Cu, 65Zn, and 69mZn to 67Cu are extremely low. The result indicates that the 68Zn(n,x)67Cu reaction is the most promising among those proposed routes until now for producing high-quality 67Cu, and could solve a longstanding problem of establishing an appropriate production method for 67Cu..
45. Nozomi Sato, Kazuaki Tsukada, Satoshi Watanabe, Noriko S. Ishioka, Masako Kawabata, Hideya Saeki, Yasuki Nagai, Tadahiro Kin, Futoshi Minato, Nobuyuki Iwamoto, Osamu Iwamoto, First Measurement of the Radionuclide Purity of the Therapeutic Isotope 67Cu Produced by 68Zn(n, x) Reaction Using nat C(d, n) Neutrons, journal of the physical society of japan, 10.7566/JPSJ.83.073201, 83, 7, 2014.07, We have for the first time studied the radionuclide purity of the therapeutic isotope 67Cu produced by the 68Zn(n, x)67Cu reaction. The neutrons were obtained by the natC(d ,n) reaction using 40 MeV deuterons. We measured the γ-ray spectra of the reaction products produced by bombarding an enriched 68ZnO sample with the neutrons with a highpurity Ge detector. We found that the relative production yields of the impurity radionuclides 64Cu, 65Zn, and 69mZn to 67Cu are extremely low. The result indicates that the 68Zn(n, x)67Cu reaction is the most promising among those proposed routes until now for producing high-quality 67Cu, and could solve a longstanding problem of establishing an appropriate production method for 67Cu..
46. Masateru Hayashi, Tetsushi Azuma, Hiroshi Nishizawa, Hajime Nakajima, Shigeru Takushima, Kenji Inomata, Masakazu Nakanishi, Tadahiro KIN, Yukinobu Watanabe, Study of Radioactivity Analysis Method Using a Thallium Doped Sodium Iodine Scintillator With Unfolding Technique, RADIATION DETECTORS AND THEIR USES 2013, 2014.01, We have evaluated energy discrimination performance of NaI(Tl) scintillator by using unfolding techniques with response function, which considered energy resolution, and also estimated the contribution of the continuum spectrum due to the summing-effect in order to improve accuracy of measurement.
(1) The energy discrimination performance of a NaI(Tl) scintillator was improved to below 20 keV by using unfolding techniques with response function including energy resolution.
(2) The contribution of continuum spectrum due to the summing-effect was well estimated by installing the cascade γ ray emission procedure to the EGS5 code..
47. K. Kino, M. Furusaka, F. Hiraga, T. Kamiyama, Y. Kiyanagi, K. Furutaka, S. Goko, K. Y. Hara, H. Harada, M. Harada, K. Hirose, T. Kai, A. Kimura, T. Kin, F. Kitatani, M. Koizumi, F. Maekawa, S. Meigo, S. Nakamura, M. Ooi, M. Ohta, M. Oshima, Y. Toh, M. Igashira, T. Katabuchi, M. Mizumoto, J. Hori, Energy resolution of pulsed neutron beam provided by the ANNRI beamline at the J-PARC/MLF, Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 10.1016/j.nima.2013.09.060, 736, 66-74, 2014.01, We studied the energy resolution of the pulsed neutron beam of the Accurate Neutron-Nucleus Reaction Measurement Instrument (ANNRI) at the Japan Proton Accelerator Research Complex/Materials and Life Science Experimental Facility (J-PARC/MLF). A simulation in the energy region from 0.7 meV to 1 MeV was performed and measurements were made at thermal (0.76-62 meV) and epithermal energies (4.8-410 eV). The neutron energy resolution of ANNRI determined by the time-of-flight technique depends on the time structure of the neutron pulse. We obtained the neutron energy resolution as a function of the neutron energy by the simulation in the two operation modes of the neutron source: double- and single-bunch modes. In double-bunch mode, the resolution deteriorates above about 10 eV because the time structure of the neutron pulse splits into two peaks. The time structures at 13 energy points from measurements in the thermal energy region agree with those of the simulation. In the epithermal energy region, the time structures at 17 energy points were obtained from measurements and agree with those of the simulation. The FWHM values of the time structures by the simulation and measurements were found to be almost consistent. In the single-bunch mode, the energy resolution is better than about 1% between 1 meV and 10 keV at a neutron source operation of 17.5 kW. These results confirm the energy resolution of the pulsed neutron beam produced by the ANNRI beamline..
48. Yasuki Nagai, Kazuyuki Hashimoto, Yuichi Hatsukawa, Hideya Saeki, Shoji Motoishi, Nozomi Sato, Masako Kawabata, Hideo Harada, Tadahiro Kin, Kazuaki Tsukada, Tetsuya K. Sato, Futoshi Minato, Osamu Iwamoto, Nobuyuki Iwamoto, Yohji Seki, Kenji Yokoyama, Takehiko Shiina, Akio Ohta, Nobuhiro Takeuchi, Yukimasa Kawauchi, Norihito Sato, Hisamichi Yamabayashi, Yoshitsugu Adachi, Yuji Kikuchi, Toshinori Mitsumoto, Takashi Igarashi, Generation of radioisotopes with accelerator neutrons by deuterons, journal of the physical society of japan, 10.7566/JPSJ.82.064201, 82, 6, 2013.06, A new system proposed for the generation of radioisotopes with accelerator neutrons by deuterons (GRAND) is described by mainly discussing the production of 99Mo used for nuclear medicine diagnosis. A prototype facility of this system consists of a cyclotron to produce intense accelerator neutrons from the natC(d,n) reaction with 40MeV 2mA deuteron beams, and a sublimation system to separate 99mTc from an irradiated 100MoO3 sample. About 8.1 TBq/week of 99Mo is produced by repeating irradiation on an enriched 100Mo sample (251 g) with accelerator neutrons for two days three times. It meets about 10% of the 99Mo demand in Japan. The characteristic feature of the system lies in its capability to reliably produce a wide variety of high-quality, carrier-free, carrier-added radioisotopes with a minimum level of radioactive waste without using uranium. The system is compact in size, and easy to operate; therefore it could be used worldwide to produce radioisotopes for medical, research, and industrial applications..
49. Yasuki Nagai, Kazuyuki Hashimoto, Yuichi Hatsukawa, Hideya Saeki, Shoji Motoishi, Nozomi Sato, Masako Kawabata, Hideo Harada, Tadahiro KIN, Kazuaki Tsukada, Tetsuya K. Sato, Futoshi Minato, Osamu Iwamoto, Nobuyuki Iwamoto, Yohji Seki, Kenji Yokoyama, Takehiko Shiina, Akio Ohta, Nobuhiro Takeuchi, Yukimasa Kawauchi, Generation of Radioisotopes with Accelerator Neutrons by Deuterons, Journal of the Physical Society of Japan, http://dx.doi.org/10.7566/JPSJ.82.064201, 82, 064201-7 pages, 2013.05, A new system proposed for the generation of radioisotopes with accelerator neutrons by deuterons (GRAND) is
described by mainly discussing the production of 99Mo used for nuclear medicine diagnosis. A prototype facility of this
system consists of a cyclotron to produce intense accelerator neutrons from the natC(d,n) reaction with 40MeV 2mA
deuteron beams, and a sublimation system to separate 99mTc from an irradiated 100MoO3 sample. About 8.1 TBq/week
of 99Mo is produced by repeating irradiation on an enriched 100Mo sample (251 g) with accelerator neutrons for two
days three times. It meets about 10% of the 99Mo demand in Japan. The characteristic feature of the system lies in its
capability to reliably produce a wide variety of high-quality, carrier-free, carrier-added radioisotopes with a minimum
level of radioactive waste without using uranium. The system is compact in size, and easy to operate; therefore it could
be used worldwide to produce radioisotopes for medical, research, and industrial applications..
50. Tadahiro Kin, Yasuki Nagai, Nobuyuki Iwamoto, Futoshi Minato, Osamu Iwamoto, Yuichi Hatsukawa, Mariko Segawa, Hideo Harada, Chikara Konno, Kentaro Ochiai, Kosuke Takakura, New production routes for medical isotopes 64Cu and 67Cu using accelerator neutrons, journal of the physical society of japan, 10.7566/JPSJ.82.034201, 82, 3, 2013.03, We have measured the activation cross sections producing 64Cu and 67Cu, promising medical radioisotopes for molecular imaging and radioimmunotherapy, by bombarding a natural zinc sample with 14MeV neutrons. We estimated the production yields of 64Cu and 67Cu by fast neutrons from natC(d,n) with 40MeV 5mA deuterons. We used the present result together with the evaluated cross section of Zn isotopes. The calculated 64Cu yield is 1.8 TBq (175 g 64Zn) for 12 h of irradiation; the yields of 67Cu by 67Zn(n,p) 67Cu and 68Zn(n,x)67Cu were 249 GBq (184 g 67Zn) and 287 GBq (186 g 68Zn) at the end of 2 days of irradiation, respectively. From the results, we proposed a new route to produce 67Cu with very little radionuclide impurity via the 68Zn(n,x)67Cu reaction, and showed the 64Zn(n,p)64Cu reaction to be a promising route to produce 64Cu. Both 67Cu and 64Cu are noted to be produced using fast neutrons..
51. Tadahiro KIN, Yasuki Nagai, Nobuyuki Iwamoto, Futoshi Minato, Osamu Iwamoto, Yuichi Hatsukawa, Mariko Segawa, Hideo Harada, Chikara Konno, Kentaro Ochiai, Kosuke Takakura, New Production Routes for Medical Isotopes 64Cu and 67Cu Using Accelerator Neutrons, Journal of the Physical Society of Japan, 82, 034201-8 pages, 2013.02, We have measured the activation cross sections producing 64Cu and 67Cu, promising medical radioisotopes for molecular imaging and radioimmunotherapy, by bombarding a natural zinc sample with 14 MeV neutrons. We estimated the production yields of 64Cu and 67Cu by fast neutrons from natC(d,n) with 40MeV 5mA deuterons. We used the present result together with the evaluated cross section of the (n,x) reaction on Zn isotopes. The calculated 64Cu yield is 1.8 TBq (175 g 64Zn) for 12 hours of irradiation; the yields of 67Cu by 67Zn(n,p)67Cu and 68Zn(n,x)67Cu were 249 GBq (184 g 67Zn) and 287 GBq (186 g 68Zn) at the end of 2 days of irradiation, respectively. From the results, we proposed a new route to produce 67Cu with very little radionuclide impurity via the 68Zn(n,x)67Cu reaction, and showed the 64Zn(n,p)64Cu reaction to be a promising route to produce 64Cu. Both 67Cu and 64Cu should be noted to be produced by using fast neutrons..
52. Kentaro Hirose, Kazuyoshi Furutaka, Kaoru Y. Hara, Hideo Harada, Atsushi Kimura, Tadahiro Kin, Fumito Kitatani, Mitsuo Koizumi, Shoji Nakamura, Masumi Oshima, Yosuke Toh, Masayuki Igashira, Tatsuya Katabuchi, Motoharu Mizumoto, Takashi Kamiyama, Koichi Kino, Yoshiaki Kiyanagi, Jun-ichi Hori, Cross-section measurement of Np-237(n,gamma) from 10 meV to 1 keV at Japan Proton Accelerator Research Complex, Journal of Nuclear Science and Technology, 10.1080/00223131.2013.757470, 50, 2, 188-200, 2013.01, The cross-section of the Np-237(n,gamma) reaction has been measured in the energy range from 10 meV to 1 keV using the ANNRI-NaI(Tl) spectrometer at the Japan Proton Accelerator Research Complex (JPARC).
The cross-section was obtained relative to that of the B-10(n,alpha1) reaction. The absolute value of the cross-section was deduced by normalizing the relative cross-section to the evaluated value of JENDL-4.0 at the first resonance. The thermal cross-section was obtained to be (176.7 ±0.5sta ±4.7sys)b. The Maxwellian-averaged cross-section for kT = 25.3 meV was derived as (174.6 ±0.6sta ±5.1sys) b by referring the cross-section below 10 meV from JENDL-4.0. These results lead to the Westcott’s g-factor of 0.988 ±0.004sta ±0.009sys..
53. Atsushi Kimura, Toshiyuki Fujii, Satoshi Fukutani, Kazuyoshi Furutaka, Shinji Goko, Kaoru Y. Hara, Hideo Harada, Kentaro Hirose, Jun Ichi Hori, Masayuki Igashira, Takashi Kamiyama, Tatsuya Katabuchi, Tadahiro Kin, Koichi Kino, Fumito Kitatani, Yoshiaki Kiyanagi, Mitsuo Koizumi, Motoharu Mizumoto, Shoji Nakamura, Masayuki Ohta, Masumi Oshima, Koichi Takamiya, Yosuke Toh, Erratum
Neutron-capture cross-sections of 244Cm and 246Cm measured with an array of large germanium detectors in the ANNRI at J-PARC/MLF (Journal of Nuclear Science and Technology (2012) 49 (708-724)), journal of nuclear science and technology, 10.1080/00223131.2012.725882, 49, 11, 2012.11.
54. H. X. Wang, Y. H. Zhang, X. H. Zhou, M. L. Liu, B. Ding, G. S. Li, W. Hua, H. B. Zhou, S. Guo, Y. H. Qiang, M. Oshima, M. Koizumi, Y. Toh, A. Kimura, H. Harada, K. Furutaka, F. Kitatani, S. Nakamura, Y. Hatsukawa, M. Ohta, K. Hara, T. Kin, J. Meng, Rotational band properties of 173W, Physical Review C - Nuclear Physics, 10.1103/PhysRevC.86.044305, 86, 4, 2012.10, High-spin states in 173W have been studied using the 150Nd(28Si,5n)173W reaction at beam energies of 135 and 140 MeV. The previously known bands associated with the 7/2+[633], 5/2-[512], and 1/2 -[521] configurations are extended significantly, and the unfavored signature branch of the 1/2-[521] band is established for the first time. The band properties, such as level spacings, band-crossing frequencies, alignment gains, and signature splittings, are discussed with an emphasis on the low-spin signature inversion observed in the 5/2-[512] band. By comparing the experimental B(M1)/B(E2) ratios with the theoretical values, we conclude that the configuration of the 5/2-[512] band is quite pure at low spins without appreciable admixture of the 5/2-[523] orbit, in conflict with the particle rotor model calculated results..
55. Masumi Oshima, Tadahiro Kin, Shoji Nakamura, Michio Honma, Futoshi Minato, Takehito Hayakawa, Kaoru Y. Hara, Atsushi Kimura, Mitsuo Koizumi, Hideo Harada, Jun Goto, and Yukihiro Murakami, Spectroscopic Study of 63Ni via Cold Neutron Capture Reaction: I. Nuclear Structure of 63Ni, Journal of Physical Society of Japan, 10.1143/JPSJ.81.084201, 81, 084201(15 pages), 2012.07, The γ-radiation has been investigated for 63Ni produced by cold neutron capture in an enriched 62Ni sample. The 315 γ-rays produced were placed in a 63Ni level scheme, in which 272 placements are new. We determined the excitation energies with 0.2–0.8 keV error and the branching ratios of 62 bound levels in 63Ni, including 30 new levels. The Q-value of the 62Ni(n,γ)63Ni reaction amounts to 6837.75±0.18 keV. A large-scale shell-model calculation was performed that included the four single-particle orbits of 0f7/2, 1p3/2, 0f5/2, and 1p1/2, assuming an inert 40Ca core for negative-parity states, and those of 1p3/2, 0f5/2, 1p1/2, and 0g9/2, assuming a 56Ni core for positive-parity states. The energies of the low-lying 63Ni states were successfully reproduced. A mean-field statistical-model calculation was also performed by using a self-consistent interaction between the Hartree–Fock + Bardeen–Cooper–Schrieffer method and the statistical calculation. The calculation result is consistent with the experimental level density of 63Ni. .
56. Atsushi Kimura, Toshiyuki Fujii, Satoshi Fukutani, Kazuyoshi Furutaka, Shinji Goko, Kaoru Y. Hara, Hideo Harada, Kentaro Hirose, Jun-ichi Hori, Masayuki Igashira, Takashi Kamiyama, Tatsuya Katabuchi, Tadahiro Kin, Koichi Kino, Fumito Kitatani, Yoshiaki Kiyanagi, Mitsuo Koizumi, Motoharu Mizumoto, Shoji Nakamura, Masayuki Ohta, Masumi Oshima, Koichi Takamiya and Yosuke Toh, Neutron-capture cross-sections of 244Cm and 246Cm measured with an array of large germanium detectors in the ANNRI at J-PARC/MLF, Journal of Nuclear Science and Technology , 10.1080/00223131.2012.693887, 49, 7, 708-724, 2012.06, The neutron neutron-capture cross cross-sections of 244Cm and 246Cm were measured by the time-of-flight method in the energy range of 1–300 300 eV with an array of large germanium detectors in the Accurate Neutron-Nucleus Reaction measurement InstrumentANNRI at Material and Life Science Experimental Facility (MLF) of the Japan Proton Accelerator Research ComplexJ-PARC/MLF. The 244Cm resonances at around 7.7 and 16.8 8 eV and the 246Cm resonances at around 4.3 and 15.3 3 eV were observed in the capture reactions for the first time. The uncertainties of the obtained cross cross-sections are 5.8% at the top of the first resonance of 244Cm and 6.6% at that of 246Cm. The rResonance analyses were performed for low-energy ones using the code SAMMY. The prompt γ-ray spectra of 244Cm and 246Cm were also obtained. Eight and five new prompt γ-ray emissions were observed in the 244Cm(n, γ) and 246Cm(n, γ) reactions, respectively..
57. Y. Toh, Y. Murakami, K. Furutaka, A. Kimura, M. Koizumi, K. Hara, T. Kin, S. Nakamura, H. Harada, Feasibility study for the quantification of total protein content by multiple prompt gamma-ray analysis, Applied Radiation and Isotopes, 10.1016/j.apradiso.2012.02.116, 70, 6, 984-987, 2012.06, Protein is an important nutrient in foods. The classical nitrogen analysis method is the Kjeldahl technique, which is time-consuming and inconvenient. As a convenient method to quantify protein content in biological samples, the feasibility of application of multiple prompt gamma-ray analysis (MPGA) to the quantification was studied. Results for protein content are reported for several reference materials and prove the method to be reliable..
58. Y. Oura, R. Watanabe, M. Ebihara, Y. Murakami, Y. Toh, A. Kimura, M. Koizumi, K. Furutaka, M. Oshima, K. Hara, T. Kin, S. Nakamura, H. Harada, Application of Multiple Prompt Gamma-ray Analysis (MPGA) to Geochemical and Cosmochemical Samples, Journal of Radioanalytical and Nuclear Chemistry, 291, 2, 335-339, 2012.02, A prompt gamma-ray analysis system using multiple detection method (MPGA system) was constructed at the neutron guide hall of the JRR-3M reactor of the Japan Atomic Energy Agency. We applied MPGA method to geochemical and cosmochemical samples to evaluate its analytical performance on signal to noise (S/N) ratio, sensitivity, and detection limit. The S/N ratio measured by MPGA system was larger than that by normal prompt gamma ray activation analysis (PGAA) at JRR-3M. For some elements, the S/N ratio was improved more than ten times. Several elements that are not detected by PGAA were detected by MPGA. At the present time, concentrations of major elements and trace elements with high neutron capture cross section in geochemical and cosmochemical samples were determined accurately by the MPGA system installed at JRR-3M. It is expected that it will determine a lot of trace elements after appropriate adjustments and modifications..
59. Y. Oura, R. Watanabe, M. Ebihara, Y. Murakami, Y. Toh, A. Kimura, M. Koizumi, K. Furutaka, M. Oshima, K. Hara, Tadahiro Kin, S. Nakamura, H. Harada, Application of multiple prompt gamma-ray analysis (MPGA) to geochemical and cosmochemical samples, Journal of Radioanalytical and Nuclear Chemistry, 10.1007/s10967-011-1292-7, 291, 2, 335-339, 2012.01, A prompt gamma-ray analysis system using multiple detection method (MPGA system) was constructed at the neutron guide hall of the JRR-3M reactor of the Japan Atomic Energy Agency. We applied MPGA method to geochemical and cosmochemical samples to evaluate its analytical performance on signal to noise (S/N) ratio, sensitivity, and detection limit. The S/N ratio measured by MPGA system was larger than that by normal prompt gamma ray activation analysis (PGAA) at JRR-3M. For some elements, the S/N ratio was improved more than ten times. Several elements that are not detected by PGAA were detected by MPGA. At the present time, concentrations of major elements and trace elements with high neutron capture cross section in geochemical and cosmochemical samples were determined accurately by the MPGA system installed at JRR-3M. It is expected that it will determine a lot of trace elements after appropriate adjustments and modifications..
60. Katsumi Shozugawa, Motoyuki Matsuo, Yuji Sano, Yosuke Toh, Yukihiro Murakami, Kazuyoshi Furutaka, Mitsuo Koizumi, Atsushi Kimura, Kaoru Hara, Tadahiro Kin, Masumi Oshima, Shoji Nakamura, Hideo Harada, Chemical composition of sediments from marine shallow-water hydrothermal mounds in Wakamiko submarine crater revealed by multiple prompt gamma-ray analysis, Journal of Radioanalytical and Nuclear Chemistry, 10.1007/s10967-011-1347-9, 291, 2, 341-346, 2012.01, Multiple prompt gamma-ray analysis (MPGA), a new radionuclide quantification method with high energy resolution, was applied to sediments from a marine shallow- water hydrothermal mound. Surface sediments around mounds were collected from the Wakamiko submarine crater located in Kagoshima Bay, southwest Japan, where the hydrothermal system was different from those at other marine shallow-water hydrothermal mounds. All samples were desalted and MPGA measurements were performed for 4,500 s (real time). Event data were obtained using eight Canberra-Eurisys CLOVER Ge detectors. The size of the list data that included all multiple events was from 1.19 to 19.2 GB. We could obtain concentrations of 32S, 55Mn, 75As, 157Gd, 39K, 149Sm, 56Fe, and 85Rb with high sensitivity by MPGA. Furthermore, 32S, 85Rb, and 55Mn have characteristic concentrations only at a mound, not at control sampling sites, suggesting that sediments were sulfurated by magmatic fluids at this mound..
61. Yusuke Uozumi, Yusuke Sawada, Aleksandre Mzhavia, Sho Nogamine, Hiroki Iwamoto, Tadahiro Kin, Shinya Hohara, Genichiro Wakabayashi, Masahiro Nakano, Deuteron-production double-differential cross sections for 300- and 392-MeV proton-induced reactions deduced from experiment and model calculation, Physical Review C, 84, 064617, 2011.12, Deuteron production from intermediate-energy proton-nucleus interactions was investigated through experiments and model calculations, mainly to develop a theoretical model by elucidating the mechanism of cluster production. Spectral double-differential cross sections were measured for inclusive (p,dx) reactions on five targets in the periodic table, namely 12C, 27 Al, 51 V, 93Nb, and 197Au, at beam energies of 300 and 392 MeV. The cross sections were determined in almost the entire outgoing energy range from the highest down to 30 MeV and at laboratory angles from 20∘ to 104∘. To interpret the measured spectra, we proposed a new model that includes the nucleon correlations of the initial- and final-state interactions to describe cluster knockout and pickup within the intranuclear cascade model. The results of the model calculations showed reasonable agreements with those of the experiments. Moreover, the model indicated reasonable predictive power for the (p,3 Hex), (p,αx), and (d,d′x) reactions measured elsewhere. The quantum molecular dynamics model underpredicts the results of the experiments by two to three orders except for low-energy portions of the (p,dx) spectra..
62. Yusuke Uozumi, Yusuke Sawada, Aleksandre Mzhavia, Sho Nogamine, Hiroki Iwamoto, Tadahiro Kin, Shinya Hohara, Genichiro Wakabayashi, Masahiro Nakano, Deuteron-production double-differential cross sections for 300- and 392-MeV proton-induced reactions deduced from experiment and model calculation, Physical Review C - Nuclear Physics, 10.1103/PhysRevC.84.064617, 84, 6, 2011.12, Deuteron production from intermediate-energy proton-nucleus interactions was investigated through experiments and model calculations, mainly to develop a theoretical model by elucidating the mechanism of cluster production. Spectral double-differential cross sections were measured for inclusive (p,dx) reactions on five targets in the periodic table, namely 12C, 27Al, 51V, 93Nb, and 197Au, at beam energies of 300 and 392 MeV. The cross sections were determined in almost the entire outgoing energy range from the highest down to 30 MeV and at laboratory angles from 20 to 104. To interpret the measured spectra, we proposed a new model that includes the nucleon correlations of the initial- and final-state interactions to describe cluster knockout and pickup within the intranuclear cascade model. The results of the model calculations showed reasonable agreements with those of the experiments. Moreover, the model indicated reasonable predictive power for the (p,3Hex), (p,αx), and (d,dx) reactions measured elsewhere. The quantum molecular dynamics model underpredicts the results of the experiments by two to three orders except for low-energy portions of the (p,dx) spectra..
63. T. KIN, K. Furutaka, S. Goko, H. Harada, J. Hori, M. Igashira, T. Kamiyama, T. Katabuchi, A. Kimura, K. Kino, F. Kitatani, Y. Kiyanagi, M. Koizumi, M. Mizumoto, S. Nakamura, M. Ohta, M. Oshima, and Y. Toh, THE “4π GERMANIUM SPECTROMETER” FOR MEASUREMENTS OF NEUTRON CAPTURE CROSS SECTIONS BY THE TIME-OF-FLIGHT METHOD AT THE J-PARC/MLF/NNRI, Journal of the Korean Physical Society, 59, 1769, 2011.08.
64. K. Y. HARA, T. KIN, M. OSHIMA, S. NAKAMURA, A. KIMURA, M. KOIZUMI, and Y. TOH, PROMPT GAMMA RAYS EMITTED FROM THE NEURTON CAPTURE REACTION OF 74GE, Journal of the Korean Physical Society, 59, 1832-1835, 2011.08, The decay scheme of 75Ge in the 74Ge(n,ャ) reaction has been studied. Multiple prompt gamma rays emitted from the 74Ge(ncold,ャ)75Ge reaction were measured with a germanium gamma-ray spectrometer at the Japan Research Reactor (JRR-3) of JAEA. Many unknown ャ-ray transitions, in addition to the known ones, were seen in the energy spectrum. 14 new levels and 35 new ャ-ray transitions of 75Ge are reported..
65. A. Kimura, K. Furutaka, S. Goko, H. Harada, T. Kin, F. Kitatani, M. Koizumi, S. Nakamura, M. Ohta, M. Oshima, Y. Toh, T. Fujii, S. Fukutani, J. Hori, K. Takamiya, M. Igashira, T. Katabuchi, M. Mizumoto, T. Kamiyama, K. Kino and Y. Kuyanagi, MEASUREMENTS OF NEUTRON-CAPTURE CROSS SECTIONS OF 244CM AND 246CM AT J-PARC/MLF/NNRI, Journal of the Korean Physical Society, 59, 1828-1831, 2011.08, For developments of innovative nuclear reactors, strong demands exist for the improvement of the accuracy of the neutroncapture cross sections of minor actinides (MAs) and long-lived fission products. We have constructed a Ge-spectrometer using the Accurate Neutron-Nucleus Reaction measurement Instrument (ANNRI) in the J-PARC materials and life science experimental facility (MLF). Preliminary neutroncapture cross sections of 244Cm and 246Cm were obtained in the neutron energy range from 1.0 eV up to 300 eV..
66. Yasuki NAGAI, Yuichi HATSUKAWA, Tadahiro KIN, Kazuyuki HASHIMOTO, Shoji MOTOISHI, Chikara KONNO, Kentaro OCHIAI, Kosuke TAKAKURA, Yuichi SATO, Yukimasa KAWAUCHI, Norihito SATO, Akio OHTA, Hisamichi YAMABAYASHI, Masakazu TANASE, Saburo FUJISAKI, Tomoyuki TERANAKA, Nobuhiro TAKEUCHI, and Takashi IGARASHI, Successful Labeling of 99mTc-MDP using 99mTc Separated from 99Mo Produced by 100Mo(n,2n)99Mo, Journal of the Physical Society of Japan, 80, 8, 083201, 2011.08, We have for the first time succeeded in separating 99mTc from a MoO3 sample irradiated with accelerator neutrons free from any radioactive impurities and in formulating 99mTc-methylene diphosphonate (99mTc-MDP). 99Mo, the mother nuclide of 99mTc, was produced by the 100Mo(n,2n)99Mo reaction using about 14 MeV neutrons provided by the 3H(d,n)4He reaction at the Fusion Neutronics Source of Japan Atomic Energy Agency. The 99mTc was separated from 99Mo by sublimation and its radionuclide purity was confirmed to be higher than 99.99% by γ-spectroscopy. The labeling efficiency of 99mTc-MDP was shown to be higher than 99% by thin-layer chromatography. These values exceed the United States Pharmacopeia requirements for a fission product, 99Mo. Consequently, a 99mTc radiopharmaceutical preparation formed by using the mentioned 99Mo can be a promising substitute for the fission product 99Mo, which is currently produced using a highly enriched uranium target in aging research reactors. A longstanding problem to ensure a reliable and constant supply of 99Mo in Japan can be partially mitigated..
67. S. Nakamura, K. Furutaka, S. Goko, H. Harada, A. Kimura, T. Kin, F. Kitatani, M. Koizumi, M. Ohta, M. Oshima, Y. Toh, J. Hori, T. Fujii, S. Fukutani, K. Takamiya, M. Igashira, T. Katabuchi, M. Mizumoto, T. Kamiyama, T. Kino and Y. Kiyanagi, Measurements of Neutron-Capture Cross Sections of Palladium Isotopes at the J-PARC/MLF/ANNRI, Journal of Korean Physical Society, 59, 1773-1776, 2011.08, The operation of a new experimental apparatus called ``Accurate Neutron-Nucleus Reaction measurement Instrument (ANNRI)''in the Material and Life science experimental Facility (MLF) at the Japan Proton Accelerator Research Complex (J-PARC) has been started for neutroncapture crosssection measurements of minor actinides and long-lived fission products. As a part of the measurements, we have measured the time-of-flight spectra of palladium-105, 106, 107 and 108 with a ``4π Ge spectrometer'' installed at the ANNRI. We obtained preliminary results of the cross sections for palladium-107 and 105 in neutron energies ranging from 0.1 eV to 300 eV..
68. H. Harada, S. Goko, A. Kimura, M. Ohta, M. Oshima, F. Kitatani, Y. Toh, K. Furutaka, T. Kin, M. Koizumi, S. Nakamura, M. Igashira, T. Katabuchi, M. Mzumoto, T. Ohsaki, J. Hori, T. Fujii, K. Takamiya, J. Goto, Y. Kiyanagi, K. Kino, M. Furusaka, F. Hiraga and T. Kamiyama, Study of Neutron Capture Reactions Using the 4π Ge Spectrometer, Journal of the Korean Physical Society, 59, 1547-1552, 2011.08, The 4π Ge spectrometer composed of 22-30 Ge detectors was developed, and it has been used to study neutron capture reactions with a neutron time-of-flight (TOF) technique. Since the distances between the sample position and the Ge detectors are variable, it can be used as a multifunctional spectrometer. At first, it was used as a sum energy spectrometer, and resonances in natAg were identified as those of 107Ag or 109Ag. In second, it was used to deduce ャ-ray intensity distribution for each resonance, and the results for 238U were presented. In third, it was used to measure neutron capture cross sections of minor actinides and fission products at the electron linear accerelator facility of KURRI and at the accurate neutron-nucleus reaction measurement instrument (ANNRI) in MLF of J-PARC The preliminary results are discussed mainly based on measurements of neutron capture cross section for 241Am, together with related techniques..
69. J. Hori, K. Furutaka, S. Goko, H. Harada, A. Kimura, T. Kin, F. Kitatani, M. Koizumi, S. Nakamura, M. Ohta, M. Oshima, Y. Toh, M. Igashira, T. Katabuchi, M. Mizumoto, T. Kamiyama, K. Kino and Y. Kiyanagi, Measurement of Neutron Capture Gamma Rays from the Resonances of 91Zr and 96Zr at the J-PARC/MLF/ANNRI, Journal of the Korean Physical Society, 59, 1777-1780, 2011.08, The prompt gamma rays from the neutron capture reactions by 91Zr and 96Zr were measured. A neutron time-of-flight (TOF) method was adopted with a 4π Ge spectrometer installed at the Accurate Neutron-Nucleus Reaction measurement Instrument (ANNRI) in the J-PARC Material and Life science experimental Facility (MLF). The gamma-ray pulse-height spectra corresponding to the 292-eV resonance of 91Zr and the 301-eV resonance of 96Zr were obtained by gating on the TOF regions, respectively. The relative intensities of those transitions were derived. Moreover, we have demonstrated the nuclide discrimination technique by identifying 91Zr resonances (isotopic composition of 5.3%) in the measurement of 96Zr sample This technique can be applicable to the neutron capture measurement for a small amount of sample expected in case of long-lived fission products (LLFPs) such as 93Zr..
70. K. Kino, Y. Kiyanagi, M. Furusaka, F. Hiraga, T. Kamiyama, K. Kato, M. Igashira, T. Katabuchi, M. Mizumoto, M. Oshima, H. Harada, J. Katakura, K. Furutaka, S. Goko, A. Kimura, T. Kin, F. Kitatani, M. Koizumi, S. Nakamura, M. Ohta, Y. Toh, T. Ohtsuki, K. Hirose, T. Fujii, J. Hori, K. Takamiya, S. Fukutani, M. Shibata, K. Yamada and H. Utsunomiya, The 'Study on Nuclear Data by Using a High Intensity Pulsed Neutron Source for Advanced Nuclear System' Nuclear Data Project and the Characteristics of the Neutron Beam Line for the Capture Cross Section Experiments at J-PARC, Journal of the Korean Physical Society, 59, 1781-1784, 2011.08, A project on the comprehensive nuclear data research for the development of the advanced reactor systems had been executed successfully by eight organizations from 2005 to 2009. In this project, we constructed a pulsed neutron beamline that was aimed to obtain neutron capture cross-sections of long-lived fission products and minor actinides accurately. The energy spectra, spatial distributions, and pulses of the beam were studied by measurements and simulation calculations, and they were found to be consistent with those of the beamline design. In this paper, we present the overview of the project and the properties of the neutron beam provided by this beam line..
71. J. Hori, K. Furutaka, S. Goko, H. Harada, A. Kimura, T. Kin, F. Kitatani, M. Koizumi, S. Nakamura, M. Ohta, M. Oshima, Y. Toh, M. Igashira, T. Katabuchi, M. Mizumoto, T. Kamiyama, K. Kino, Y. Kiyanagi, Measurement of neutron capture gamma rays from the resonances of91Zr and 96Zr at the J-PARC/MLF/ANNRI, Journal of the Korean Physical Society, 10.3938/jkps.59.1777, 59, 23, 1777-1780, 2011.08, The prompt gamma rays from the neutron capture reactions by 91Zr and 96Zr were measured. A neutron time-of-flight (TOF) method was adopted with a 4π Ge spectrometer installed at the Accurate Neutron-Nucleus Reaction measurement Instrument (ANNRI) in the J-PARC Material and Life science experimental Facility (MLF). The gamma-ray pulse-height spectra corresponding to the 292-eV resonance of 91Zr and the 301-eV resonance of 96Zr were obtained by gating on the TOF regions, respectively. The relative intensities of those transitions were derived. Moreover, we have demonstrated the nuclide discrimination technique by identifying 91Zr resonances (isotopic composition of 5.3%) in the measurement of 96Zr sample. This technique can be applicable to the neutron capture measurement for a small amount of sample expected in case of long-lived fission products (LLFPs) such as 93Zr..
72. S. Nakamura, K. Furutaka, S. Goko, H. Harada, A. Kimura, T. Kin, F. Kitatani, M. Koizumi, M. Ohta, M. Oshima, Y. Toh, J. Hori, T. Fujii, S. Fukutani, K. Takamiya, M. Igashira, T. Katabuchi, M. Mizumoto, T. Kamiyama, K. Kino, Y. Kiyanagi, Measurements of neutron-capture cross sections of palladium isotopes at the J-PARC/MLF/ANNRI, Journal of the Korean Physical Society, 10.3938/jkps.59.1773, 59, 23, 1773-1776, 2011.08, The operation of a new experimental apparatus called "Accurate Neutron-Nucleus Reaction mea- surement Instrument (ANNRI)"in the Material and Life science experimental Facility (MLF) at the Japan Proton Accelerator Research Complex (J-PARC) has been started for neutroncapture crosssection measurements of minor actinides and long-lived fission products. As a part of the mea- surements, we have measured the time-of-flight spectra of palladium-105, 106, 107 and 108 with a "4π Ge spectrometer" installed at the ANNRI. We obtained preliminary results of the cross sections for palladium-107 and 105 in neutron energies ranging from 0.1 eV to 300 eV..
73. A. Kimura, K. Furutaka, S. Goko, H. Harada, T. Kin, F. Kitatani, M. Koizumi, S. Nakamura, M. Ohta, M. Oshima, Y. Toh, T. Fujii, S. Fukutani, J. Hori, K. Takamiya, M. Igashira, T. Katabuchi, M. Mizumoto, T. Kamiyama, K. Kino, Y. Kuyanagi, Measurements of neutron-capture cross sections of 244Cm and 246Cm at J-PARC/MLF/ANNRI, Journal of the Korean Physical Society, 10.3938/jkps.59.1828, 59, 23, 1828-1831, 2011.08, For developments of innovative nuclear reactors, strong demands exist for the improvement of the accuracy of the neutroncapture cross sections of minor actinides (MAs) and long-lived fission products. We have constructed a Ge-spectrometer using the Accurate Neutron-Nucleus Reaction measurement Instrument (ANNRI) in the J-PARC materials and life science experimental facility (MLF). Preliminary neutroncapture cross sections of 244Cm and 246Cm were obtained in the neutron energy range from 1.0 eV up to 300 eV..
74. K. Y. Hara, T. Kin, M. Oshima, S. Nakamura, A. Kimura, M. Koizumi, Y. Toh, Prompt gamma rays emitted from the neutron capture reaction of 74Ge, Journal of the Korean Physical Society, 10.3938/jkps.59.1832, 59, 23, 1832-1835, 2011.08, The decay scheme of 75Ge in the 74Ge(n,γ) reaction has been studied. Multiple prompt gamma rays emitted from the 74Ge(ncold,γ)75Ge reaction were measured with a germanium gamma-ray spectrometer at the Japan Research Reactor (JRR-3) of JAEA. Many unknown γ-ray transitions, in addition to the known ones, were seen in the energy spectrum. 14 new levels and 35 new γ-ray transitions of 75Ge are reported..
75. H. Harada, S. Goko, A. Kimura, M. Ohta, M. Oshima, F. Kitatani, Y. Toh, K. Furutaka, T. Kin, M. Koizumi, S. Nakamura, M. Igashira, T. Katabuchi, M. Mizumoto, T. Ohsaki, J. Hori, T. Fujii, K. Takamiya, J. Goto, Y. Kiyanagi, K. Kino, M. Furusaka, F. Hiraga, T. Kamiyama, Study of neutron capture reactions using the 4π ge spectrometer, Journal of the Korean Physical Society, 10.3938/jkps.59.1547, 59, 23, 1547-1552, 2011.08, The 4π Ge spectrometer composed of 22-30 Ge detectors was developed, and it has been used to study neutron capture reactions with a neutron time-of-flight (TOF) technique. Since the distances between the sample position and the Ge detectors are variable, it can be used as a multifunctional spectrometer. At first, it was used as a sum energy spectrometer, and resonances in natAg were identified as those of 107Ag or 109Ag. In second, it was used to deduce γ-ray intensity distribution for each resonance, and the results for 238U were presented. In third, it was used to measure neutron capture cross sections of minor actinides and fission products at the electron linear accerelator facility of KURRI and at the accurate neutron-nucleus reaction measurement instrument (ANNRI) in MLF of J-PARC. The preliminary results are discussed mainly based on measurements of neutron capture cross section for 241Am, together with related techniques..
76. Yasuki Nagai, Yuichi Hatsukawa, Tadahiro Kin, Kazuyuki Hashimoto, Shoji Motoishi, Chikara Konno, Kentaro Ochiai, Kosuke Takakura, Yuichi Sato, Yukimasa Kawauchi, Norihito Sato, Akio Ohta, Hisamichi Yamabayashi, Masakazu Tanase, Saburo Fujisaki, Tomoyuki Teranaka, Nobuhiro Takeuchi, Takashi Igarashi, Successful labeling of 99mTc-MDP using 99mTc separated from 99Mo produced by 100Mo(n,2n)99Mo, journal of the physical society of japan, 10.1143/JPSJ.80.083201, 80, 8, 2011.08, We have for the first time succeeded in separating 99mTc from a MoO3 sample irradiated with accelerator neutrons free from any radioactive impurities and in formulating 99mTc-methylene diphosphonate (99mTc-MDP). 99Mo, the mother nuclide of 99mTc, was produced by the 100Mo(n; 2n)99Mo reaction using about 14MeV neutrons provided by the 3H(d; n) 4He reaction at the Fusion Neutronics Source of Japan Atomic Energy Agency. The 99mTc was separated from 99Mo by sublimation and its radionuclide purity was confirmed to be higher than 99.99% by γ-spectroscopy. The labeling efficiency of 99mTc-MDP was shown to be higher than 99% by thin-layer chromatography. These values exceed the United States Pharmacopeia requirements for a fission product, 99Mo. Consequently, a 99mTc radiopharmaceutical preparation formed by using the mentioned 99Mo can be a promising substitute for the fission product 99Mo, which is currently produced using a highly enriched uranium target in aging research reactors. A longstanding problem to ensure a reliable and constant supply of 99Mo in Japan can be partially mitigated..
77. Y. Kiyanagi, K. Kino, M. Furusaka, F. Hiraga, T. Kamiyama, K. Kato, M. Igashira, T. Katabuchi, M. Mizumoto, M. Oshima, H. Harada, J. Katakura, K. Furutaka, S. Goko, A. Kimura, Tadahiro Kin, F. Kitatani, M. Koizumi, S. Nakamura, M. Ohta, Y. Toh, T. Ohtsuki, K. Hirose, T. Fujii, J. Hori, K. Takamiya, S. Fukutani, M. Shibata, K. Yamada, H. Utsunomiya, The 'study on nuclear data by using a high intensity pulsed neutron source for advanced nuclear system' nuclear data project and the characteristics of the neutron beam line for the capture cross section experiments at J-PARC, Journal of the Korean Physical Society, 10.3938/jkps.59.1781, 59, 23, 1781-1784, 2011.08, A project on the comprehensive nuclear data research for the development of the advanced reactor systems had been executed successfully by eight organizations from 2005 to 2009. In this project, we constructed a pulsed neutron beamline that was aimed to obtain neutron capture cross-sections of long-lived fission products and minor actinides accurately. The energy spectra, spatial distributions, and pulses of the beam were studied by measurements and simulation calculations, and they were found to be consistent with those of the beamline design. In this paper, we present the overview of the project and the properties of the neutron beam provided by this beam line..
78. T. Kin, K. Furutaka, S. Goko, H. Harada, A. Kimura, F. Kitatani, S. Nakamura, M. Ohta, M. Oshima, Y. Toh, J. Hori, M. Igashira, T. Katabuchi, M. Koizumi, M. Mizumoto, T. Kamiyama, K. Kino, Y. Kiyanagi, The "4π Ge spectrometer" for measurements of neutron capture cross sections by the TOF method at the J-PARC/MLF/ANNRI, Journal of the Korean Physical Society, 10.3938/jkps.59.1769, 59, 23, 1769-1772, 2011.08, A "4π germanium spectrometer" was developed for measurements of neutron capture cross sections of minor actinides and long-lived fission products. It was installed on the Beam Line No. 04 of the Materials and Life Science Experimental Facility of the Japan Proton Accelerator Research Complex. The time-of-flight method is used to measure the cross sections. To obtain characteristics of the spectrometer, a measurement was done of prompt gamma rays emitted following neutron capture reactions of gold whose cross section was well studied. In the present paper, we show the procedure of analysis of the data obtained with the spectrometer and discuss the characteristics to measure neutron capture cross section..
79. Y. Hatsukawa, Y. Nagai, T. Kin, M. Segawa, H. Harada, O. Iwamoto, N. Iwamoto, K. Ochiai, K. Takakura, C. Konno and M. Hashimoto, Isotope production for medical usage using fast neutron reactions, Proc. Radiochim. Acta, 1, 327-329, 2011.04.
80. Y. Murakami, M. Oshima, Y. Toh, A. Kimura, M. Koizumi, K. Furutaka, Y. Hatsukawa, T. Kin, K. Y. Hara, K. Sushida, M. Taniguchi and N. Kojima, Detection limits of trace element analyses with the JAEA MPGA system, Proc. Radiochim. Acta, 1, 405-408, 2011.04.
81. K. Kino, M. Furusaka, F. Hiraga, T. Kamiyama, Y. Kiyanagi, K. Furutaka, S. Goko, H. Harada, M. Harada, T. Kai, A. Kimura, Tadahiro Kin, F. Kitatani, M. Koizumi, F. Maekawa, S. Meigo, S. Nakamura, M. Ooi, M. Ohta, M. Oshima, Y. Toh, M. Igashira, T. Katabuchi, M. Mizumoto, Measurement of energy spectra and spatial distributions of neutron beams provided by the ANNRI beamline for capture cross-section measurements at the J-PARC/MLF, Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 10.1016/j.nima.2010.10.076, 626-627, 1, 58-66, 2011.01, We measured the energy spectra and spatial distributions of the neutron beam of Accurate Neutron-Nucleus Reaction Measurement Instrument (ANNRI) at the Japan Proton Accelerator Research Complex/Materials and Life Science Experimental Facility (J-PARC/MLF). Our research team designed and built ANNRI to measure nuclear data with high precision. The measurements of the neutron beam were performed on three types of beams provided by ANNRI in the neutron energy range from 1.5 meV to 10 keV. The energy spectra show a typical feature of para-hydrogen moderator, and the absolute intensities almost agree with predictions based on both a simulation calculation of the Japan Spallation Neutron Source (JSNS) and a neutron transmission calculation of the beamline. The available neutron intensities at 21.5 m are 7.5×105, 1.6×104, and 1.1×105 n/cm2/s in the energy ranges 1.525 meV, 0.91.1 eV, and 0.91.1 keV, respectively, under the 17.5 kW JSNS operation. The measured spatial distributions of the beams formed by three different collimators are consistent with those expected from the collimator-system design of the beamline. The beam sizes in FWHM are about 29, 14, and 11 mm for the three different beam collimators. The edges of the spatial distributions are relatively sharp, enabling us to measure the nuclear data successfully..
82. Shinji Goko, Atsushi Kimura, Hideo Harada, Masumi Oshima, Masayuki Ohta, Kazuyoshi Furutaka, Tadahiro Kin, Fumito Kitatani, Mitsuo Koizumi, Shoji Nakamura, Yosuke Toh, Masayuki Igashira, Tatsuya Katabuchi, Motoharu Mizumoto, Yoshiaki Kiyanagi, Koichi Kino, Michihiro Furusaka, Fujio Hiraga, Takashi Kamiyama, Jun Ichi Hori, Toshiyuki Fujii, Satoshi Fukutani, Koichi Takamiya, Measurement of Neutron Capture Cross Section Ratios of244Cm Resonances Using NNRI, journal of nuclear science and technology, 10.1080/18811248.2010.9720976, 47, 12, 1097-1100, 2010.12.
83. Shinji Goko, Atsushi Kimura, Hideo Harada, Masumi Oshima, Masayuki Ohta, Kazuyoshi Furutaka, Tadahiro Kin, Fumito Kitatani, Mitsuo Koizumi, Shoji Nakamura, Yosuke Toh, Masayuki Igashira, Tatsuya Katabuchi, Motoharu Mizumoto, Yoshiaki Kiyanagi, Koichi Kino, Michihiro Furusaka, Fujio Hiraga, Takashi Kamiyama, Jun Ichi Hori, Toshiyuki Fujii, Satoshi Fukutani, Koichi Takamiya, Measurement of neutron capture cross section ratios of 244Cm resonances using NNRI, journal of nuclear science and technology, 10.3327/jnst.47.1097, 47, 12, 1097-1100, 2010.12, A study was conducted to demonstrate the results of the capture cross section measurement for highly radioactive 244Cm obtained using the 4π Ge spectrometer. Neutron capture measurements with a time-of-flight (TOF) technique were carried out for a 244Cm sample, using neutron-nucleus reaction instrument (NNRI) installed at the Beam Line No. 4 (BL04) of the Materials and Life Science Experimental Facility (MLF) in the Japan Proton Accelerator Research Complex (J-PARC). A disk chopper with a semicircular shape was used to prevent the intrusion of the low-energy tail of a neutron pulse into the next pulse duration. The TOF spectrum for the Cm sample measured, using the 4π Ge spectrometer revealed the first experimental data in the world wherein the neutron capture resonances were observed below 20 eV. The neutron energy was calibrated by measuring a Au sample with neutron resonances, while the dead time of detectors was deduced by comparing the number of random timing pulses from the random pulse generator with the number of measured pulses..
84. Hiroki Iwamoto, Minoru Imamura, Yusuke Koba, Yoshinori Fukui, Genichiro Wakabayashi, Yusuke Uozumi, Tadahiro Kin, Yosuke Iwamoto, Shinya Hohara, Masahiro Nakano, Proton-production double-differential cross sections for 300-MeV and 392-MeV proton-induced reactions, Physical Review C - Nuclear Physics, 10.1103/PhysRevC.82.034604, 82, 3, 2010.09, We investigate proton-production double-differential cross sections (DDXs) for 300- and 392-MeV proton-induced reactions on O, V, Tb, Ta, Au, Pb, and Bi. Emitted proton energies are measured with stacked scintillator spectrometers by the ΔE-E technique. Experimental results are compared with the intranuclear cascade (INC) and quantum molecular dynamics models. Although both models can reproduce spectral DDXs, there is a difference at the most forward and backward angles. The cause of these differences is discussed in terms of the refraction caused by the nuclear potential. Angular distributions of the present data are well accounted for by the Kalbach systematics plus INC one-step calculations. The quasi-free-scattering contribution increases with decreasing target mass and increasing emission energy..
85. Atsushi Kimura, Kazuyoshi Furutaka, Shinji Goko, Hideo Harada, Masayuki Igashira, Takashi Kamiyama, Katabuchi Katabuchi, Tadahiro Kin, Koichi Kino, Fumito Kitatani, Yoshiaki Kiyanagi, Mitsuo Koizumi, Motoharu Mizumoto, Shoji Nakamura, Masayuki Ohta, Masumi Oshima, Yosuke Toh, A dead-time correction method for multiple gamma-ray detection, 2009 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2009 2009 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2009, 10.1109/NSSMIC.2009.5401837, 138-143, 2009.12, To correct dead time in TOF experiments with multi-detector gamma-ray detection method, we have tested a dead-time correction method. In this dead-time correction method, random timing pulses generated by a random pulse generator are input to every pre-amplifier via test-signal inputs. Both the random timing pulses and the other pulses originated from gamma rays are measured with a data acquisition system (DAQ). At the same time, a number of the input random timing pulses are counted with another fast system. Because dead time affects similarly both the pulses from the random pulse generator and the measured gamma rays, we can calculate the dead time by comparing the number of the input random timing pulses counted by the fast system with an area count of the peak due to the random timing pulses measured with the DAQ..
86. Kazuyoshi Furutaka, Atsushi Kimura, Mitsuo Koizumi, Yosuke Toh, Tadahiro Kin, Shoji Nakamura, Masumi Oshima, A simple method to measure and improve linearity of flash ADCS used in integrated VME ADC modules, 2009 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2009 2009 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2009, 10.1109/NSSMIC.2009.5402078, 2229-2233, 2009.12, To measure and improve linearities of the Flash ADCs used in the integrated VME ADC modules, pulses with exponentially falling tail were digitized and the counts of the resultant digital codes were recorded. The obtained histogram of the codes was fit to a function to deduce a smoothly varying curve which corresponds to that obtained in the case of ideal linearity, and was compared to the fit to calculate width as well as differential nonlinearity of each code. The obtained differential nonlinearities go down to as low as ∼0.7 LSB. A simple method is proposed to improve the nonlinearity using the differential nonlinearities in the post-processor following the ADC..
87. T. Kin, K. Furutaka, S. Goko, H. Harada, M. Igashira, T. Kamiyama, T. Katabuchi, A. Kimura, K. Kino, F. Kitatani, Y. Kiyanagi, M. Koizumi, M. Mizumoto, S. Nakamura, M. Ohta, M. Oshima, Y. Toh, Development of a 4π germanium spectrometer for nuclear data measurements at J-PARC, 2009 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2009 2009 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2009, 10.1109/NSSMIC.2009.5402387, 1194-1197, 2009.12, A 4π germanium spectrometer was developed for measurements of neutron capture cross sections of minor actinides and long-lived-fission products. It was installed on the Beam Line No. 04 of the MLF in the J-PARC. We measured its full-energy peak efficiency and gamma-energy resolution at 1.3-MeV with a 60Co standard source (10kBq). As an example of a result of TOF measurements with the spectrometer, preliminary TOF and energy spectra of 108Pd are shown in this paper..
88. Tadahiro Kin, Masumi Oshima, Kazuyoshi Furutaka, Mitsuo Koizumi, Yosuke Toh, Atsushi Kimura, Identification of nuclear levels of s for determination of the neutron capture cross section, 13th International Symposium on Capture Gamma-Ray Spectroscopy and Related Topics AIP Conference Proceedings, 10.1063/1.3087089, 1090, 575-576, 2009.04, We are developing a new method to identify nuclear levels based on neutron capture reactions, named "TELLA-2". Measured data of prompt gamma rays from 33S(n, γ)34S was used to improve the method. We will show how we obtain candidates of nuclear levels..
89. Masumi Oshima, Tadahiro Kin, Atsushi Kimura, Kazuyoshi Furutaka, Yosuke Tolf, Mitsuo Koizumi, Multi-Step cascades in 63Ni, 13th International Symposium on Capture Gamma-Ray Spectroscopy and Related Topics AIP Conference Proceedings, 10.1063/1.3087051, 1090, 386-390, 2009.04, Multi-step cascades from the62Nicold; γ) 63Ni reaction were studied via a γ-ray spectroscopy method. With a γ-ray detector array multiple y-ray coincident events were accumulated. By selecting full cascade events from the capture state to the ground state, we have developed a new computer-based level construction method and it is applied to excited level assignment in 63Ni..
90. Mitsuo Koizumi, Masumi Oshima, Yosuke Toh, Atsushi Kimura, Tadahiro Kin, Kazuyoshi Furutaka, Yukihiro Murakami, Akihiko Osa, Shingo Ando, An automatic liquid-nitrogen filling system for multiple Ge detectors, Review of Scientific Instruments, 10.1063/1.3059684, 80, 1, 2009.02, In order to reduce the time and effort of the daily task of refilling Dewar vessels of Ge detectors with liquid nitrogen (LN2), we have developed an automatic LN2 filling system equipped with a LN2 plant. With this system, we were freed from the work of LN2 filling. Such an LN2 filling system is useful for moderate-scale Ge detector arrays consisting of fewer than 20 Ge detectors..
91. Tadahiro Kin, Masumi Oshima, Kazuyoshi Furutaka, Mitsuo Koizumi, Yosuke Toh, Atsushi Kimura, Identification of Nuclear Levels of 34S for Determination of the Neutron Capture Cross Section, Capture Gamma-Ray Spectroscopy and Related Topics, AIP Conference Proceedings 1090, 575, 2009.01.
92. Tadahiro Kin, Ken-ichi Makino, Nobuo Noda, Kazuharu Koide and Masahiro Nakano, The Molecular Dynamics Calculation of Clathrate Hydrate Structure Stability for Innovative Organ Preservation Method, International Journal of Innovative Computing, Information and Control, 4, 2, 249, 2008.02.
93. Ken Ichi Makino, Kenta Tomonaga, Hideyasu Hirano, Masahiro Nakano, Tadahiro Kin, Hlroyuki Matsuura, Kazuharu Koide, Nobuo Noda, Design of RT-PCR primers method considered by gene family, International Journal of Innovative Computing, Information and Control, 4, 2, 269-274, 2008.02, TO detect mRNA expression levels were very useful not only for the biological studies but also for the progress of medical therapy. Furthermore, mRNA transcription suppression caused by antisense also clearized and made possible the speedy result of the cell biological investigation. We created primer design protocol using fuzzy deducing theory, because most of the traditional computer protocol succeeded less than 20%. 90% of Our primers functioned after following checking (1. GC Contents Check; 8. Self Ho-mology Check; 3. Fuzzy Deducing Homologous Check: [versus a.: GAPDH, b: Profüin, c: β-actin]). We also added 4: gene family checking to target into a real mRNA out of similar sequences, and 5; 5'-, & -3' homology checking. Fuzzy deducing checking protocol made it possible to select real VEGF mRNA from a gene family in which there are many similar seauences. ICIC International.
94. Kazuharu Koide, Hiroyuki Matsuura, Tetsuya Nemoto, Nobuo Noda, Masahiro Nakano, Ken Ichi Makino, Tadahiro Kin, Population estimation in Japan and three major cases of death, International Journal of Innovative Computing, Information and Control, 4, 2, 263-268, 2008.02, According to the national census performed in October 2005, Japan entered into a population decline society. We simulated future Japanese population, a trend of population of men and women is shown until 2060. Calculation results are shown every five years. The population is classified in age-grade of every 5 year old. The population of 5 year olds rank is shown for men and women. Aging rate is obtained based on the form of population pyramid, related directly to medical and social welfare costs. We can predict a death toll of the modern Japanese three major causes of deaths (malignant neoplasms, heart diseases, cerebro-vascular diseases) by using the death rate for three diseases for event aae-arade. ICIC International.
95. Tadahiro Kin, Ken Ichi Makino, Nobuo Noda, Kazuharu Koide, Masahiro Nakano, The molecular dynamics calculation of clathrate hydrate structure stability for innovative organ preservation method, International Journal of Innovative Computing, Information and Control, 4, 2, 249-253, 2008.02, It is very important to keep the volume of intracellular throughout organ preservation. We focused on the structure of intracellular water. It is the main unacceptable factor to change volume of cell under low temperature. Because this report is a preliminary study for new organ preservation technology, we considered a simple system that contains only water and hydrogen molecules. We simulated a stability of clathrate hydrate crystal by using a code of molecuLr dynamics method; MXDTRICL. In this paper, we give a new suggestion to suppress the change of intracellular volume under low temperature. ICIC International.
96. Tadahiro Kin, Masumi Oshima, Kazuyoshi Furutaka, Mitsuo Koizumi, Yosuke Toh and Atsushi Kimura, Development of a Spectrometer for Multiple Prompt Gamma-Ray Measurement to Identify Nuclear Levels, FRONTIERS IN NUCLEAR STRUCTURE, ASTROPHYSICS, AND REACTIONS “FINUSTAR 2”, AIP CONFERENCE PROCEEDINGS 1012, 374, 2008.01.
97. Tadahiro Kin, Masumi Oshima, Kazuyoshi Furutaka, Mitsuo Koizumi, Yosuke Toh, Atsushi Kimura, Development of a Spectrometer for Multiple Prompt Gamma-Ray Measurement to Identify Nuclear Levels, 2nd International Conference on Frontiers in Nuclear Structure, Astrophysics, and Reactions, FINUSTAR 2007 Frontiers in Nuclear Structure, Astrophysics, and Reactions, FINUSTAR 2007, 10.1063/1.2939334, 374-376, 2008.01, We developed a spectrometer for multiple prompt gamma-ray measurements to identify nuclear levels to determine neutron capture cross sections. From a test of finding candidates of 15N levels with a developing method, we found performance of the spectrometer is sufficient..
98. Atsushi Kimura, Yosuke Toh, Mitsuo Koizumi, Kazuyoshi Furutaka, Tadahiro Kin, Masumi Oshima, Performance of a high speed and high density data acquisition system for multiple gamma-ray detection, 2008 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2008 2008 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2008, 10.1109/NSSMIC.2008.4774912, 2107-2111, 2008, To accelerate the data acquisition system (DAQ), which was reported in NSS 2004[1], the authors improved the Main ADC Modules in the DAQ. The new Main ADC Module has 8 input channels. Each channel consists of analog circuits for pulse shaping, a high-speed ADC (14bit 125MSPS), and a highpower Digital Signal Processor (DSP: 8000MIPS). Shaped input signals are digitized with the ADC and analyzed by the DSP to calculate the energy data. Total energy resolution of this system was 2.5 keV in FWHM for 1.33-MeV gamma rays. Time resolution of this system was 120 ns in FWHM between two Ge detectors. These results show good performances as a conventional DAQ. The dead time of this system is only 4.3 μs Per event and the maximum event rate was more than 350k events/s. Thus, enough energy and time resolutions are achieved with short dead time, high channel density and high event rate..
99. Atsushi Kimura, Yosuke Toh, Mitsuo Koizumi, Kazuyoshi Furutaka, Akihiko Osa, Tadahiro Kin, Masumi Oshima, Improvement of a high speed and high density data acquisition system for multiple gamma-ray detection, 2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC 2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC, 10.1109/NSSMIC.2007.4436372, 474-477, 2007.12, To accelerate the data acquisition system (DAQ), which was reported in NSS 2004[1], the authors improved the Main ADC Modules in the DAQ. The new Main ADC Module has 8 input channels. Each channel consists of analog circuits for pulse shaping, a high-speed ADC (14bit 125MSPS), and a highpower Digital Signal Processor (DSP: 8000MIPS). Shaped input signals are digitized with the ADC and analyzed by the DSP to calculate the energy data. For fast data transfer, the energy data from every four channels are bundled and stored into a large Dual Port Memory (DPM: 2MByte). The bundled data are read out to a PC through VME-BUS. By combining high-speed ADCs, high-power DSPs and large DPMs, high speed and high density DAQ was constructed..
100. Y. Uozumi, P. Evtoukhovitch, H. Fukuda, M. Imamura, H. Iwamoto, V. Kalinikov, W. Kallies, N. Khumutov, T. Kin, N. Koba, Y. Koba, N. Kuchinski, A. Moisenko, D. Mzavia, M. Nakano, V. Samoilov, Z. Tsamalaidze, G. Wakabayashia, Y. Yamashita, Magnitude factor systematics of Kalbach phenomenology for reactions emitting helium and lithium ions, Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 10.1016/j.nima.2006.11.022, 571, 3, 743-747, 2007.02, We investigated the magnitude factor of the Kalbach phenomenology in order to estimate double differential cross-sections (DDXs) of (p, 3He), (p, 4He), (p, 6Li) and (p, 7Li) reactions at intermediate energies that is several hundreds of MeV. Firstly, we obtained DDXs on target nuclei, Be, C and Al by using a 392-MeV proton beam. Secondly, the magnitude factor has been formulated and parameterized by using the present data and Ag data measured elsewhere. Although the slope parameters of the magnitude factor were found to be independent of targets, absolute values are dependent. The magnitude factor shows a consistency between heavy targets, Al and Ag. In contrast, considerable different tendencies are seen for the light targets. As a result, it has been remarked that the present parameterization is of highly useful in yield estimation for experimental planning of light charged particle production reactions. It allows us to conduct such experiments with the higher efficiency..
101. Tadahiro KIN, Ken-ichi MAKINO, Kazuharu KOIDE, Tetsuya NEMOTO, Molecular Dynamics Simulation of Complex Phase Transition of Clathrate Hydrates in Living Body, 2006 International Conference on Innovative Computing, Information and Control, 556, 2007.01.
102. M. Imamura, Y. Yamashita, P. Evtoukhovitch, S. Hohara, V. Kalinikov, W. Kallies, N. Khumutov, Tadahiro Kin, N. Kuchinski, D. Maki, N. Matsufuji, A. Moisenko, D. Mzavia, V. Samoilov, Z. Tsamalaidze, Yusuke Uozumi, G. Wakabayashi, Response characteristics of GSO(Ce) crystal to intermediate-energy α-particles, Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 10.1016/j.nima.2006.04.033, 564, 1, 324-327, 2006.08, Characteristics of a GSO(Ce) crystal were investigated in terms of the light output response and the peak-to-total efficiency for impinging intermediate-energy α-particles. Experiments were carried out using α-particles of energies ranging from 143 to 718 MeV with primary α beams of 400 and 718 MeV. It has been demonstrated that the experimental results are explained well by calculations in the same manner as for protons and deuterons. In particular, no particle identity dependence of scintillation quenching phenomena have been observed between protons, deuterons and α-particles. Furthermore, good linearity is confirmed in the higher energy range up to 718 MeV. The peak-to-total efficiency was accounted for by calculations using α-nucleus reaction cross-sections..
103. Genichiro Wakabayashi, Yusuke Koba, Minoru Imamura, Yusuke Uozumi, Naoya Koba, Takuro Shimazu, Motohisa Kaneko, Hitoshi Ohkawa, Nobuo Ikeda, Tadahiro Kin, Naruhiro Matsufuji, Light output response of GSO(Ce) crystals to relativistic carbon ions, 2006 IEEE Nuclear Science Symposium, Medical Imaging Conference and 15th International Workshop on Room-Temperature Semiconductor X- and Gamma-Ray Detectors, Special Focus Workshops, NSS/MIC/RTSD 2006 IEEE Nuclear Science Symposium - Conference Record, 10.1109/NSSMIC.2006.356053, 1175-1177, 2006.01, We have investigated the light output response of a GSO(Ce) crystal to carbon ions of energy up to 3.34 GeV. An experiment was carried out with HIMAC at National Institute of Radiological Sciences in Chiba, Japan. The incident energy of carbon beam was changed by inserting target materials with different thicknesses as degraders. Experimental results were consistent with the calculated curve by Birks equation, and the light output plotted as a function of deposited energy in the GSO(Ce) crystal showed a slight non-linearity in the low energy region and a good linearity in the higher energy region above around 1.5 GeV..
104. Tadahiro Kin, Fuminobu Saiho, Shinya Hohara, Katsuhiko Ikeda, Kiyohisa Ichikawa, Yusuke Yamashita, Minoru Imamura, Genichiro Wakabayashi, Nobuo Ikeda, Yusuke Uozumi, Masaru Matoba, Masahiro Nakano, Norihiko Koori, Erratum
Publisher's note: Proton production cross sections for reactions by 300- and 392-MeV protons on carbon, aluminum, and niobium (Phys. Rev. C (2005) 72 (014606)), Physical Review C - Nuclear Physics, 10.1103/PhysRevC.72.069901, 72, 6, 2005.12.
105. Tadahiro Kin, Fuminobu Saiho, Sin-ya Hohara, Katsuhiko Ikeda, Kiyohisa Ichikawa, Yusuke Yamashita, Minoru Imamura, Genichiro Wakabayashi, Nobuo Ikeda, Yusuke Uozumi, Masaru Matoba, Norihiko Koori, Proton Production Cross Sections for Reactions Induced by 300 and 392 MeV Protons, International Conference on Nuclear Data for Science & Technology ND2004, 769, Part One, 207-210, 2005.08.
106. Tadahiro Kin, Fuminobu Saiho, Shinya Hohara, Katsuhiko Ikeda, Kiyohisa Ichikawa, Yusuke Yamashita, Minoru Imamura, Genichiro Wakabayashi, Nobuo Ikeda, Yusuke Uozumi, Masaru Matoba, Masahiro Nakano, Norihiko Koori, Proton production cross sections for reactions by 300- and 392-MeV protons on carbon, aluminum and niobium., Physical Review C, 10.1103/PhysRevC.72.014606, 72, 1, 014606, 2005.07.
107. Sin Ya Hohara, Minoru Imamura, Tadahiro Kin, Yusuke Yamashita, Daiske Maki, Fuminobu Saiho, Katsuhiko Ikeda, Yusuke Uozumi, Masaru Matoba, Development of gas proportional scintillation counter for light heavy-ion detection, International Conference on Nuclear Data for Science and Technology International Conference on Nuclear Data for Science and Technology, 10.1063/1.1945121, 769, 773-775, 2005.05, In recent years, nuclear data have been needed in the medical field. Nuclear data induced by light heavy ions are especially needed at high precision for cancer treatment, although there are not enough usable data at present. We have a plan to measure light heavy-ion nuclear data with a dE-E detector. Low density is needed for the dE detector. We have two options for the dE detector: a semiconductor detector (SSD) and a Gas Counter. On one hand, SSD has good energy resolution, but on the other hand, it is expensive and its decay time is on the 100-microsecond order. A Gas Counter is inexpensive, and a Gas Proportional Scintillation Counter (GPSC) has fast decay time. Then, we developed a GPSC for the dE detector, and its evaluation experiment was carried out at the Heavy Ion Medical Accelerator in Chiba (HIMAC). We will report the results of the experiment with the performance of the GPSC..
108. Tadahiro Kin, S. Hohara, F. Saiho, K. Ikeda, K. Ichikawa, Y. Yamashita, M. Imamura, G. Wakabayashi, Nobuo Ikeda, Yusuke Uozumi, M. Matoba, N. Koori, Proton production cross sections for reactions induced by 300- and 392-MeV protons, International Conference on Nuclear Data for Science and Technology International Conference on Nuclear Data for Science and Technology, 10.1063/1.1944991, 207-210, 2005.05, Multistep direct processes in proton production reactions were investigated with proton beam of 300- and 392-MeV bombarding targets nuclei. The targets nuclei are 181Ta, 197Au, and 209Bi for 392 MeV and 197Au for 300 MeV protons. Energy spectra were measured at several laboratory angles from 20° to 105° and compared with two theoretical models, the quantum molecular dynamics and the intranuclear cascade model. At intermediate energy, the double differential cross section is sensitive to ground state in codes. We found that a more realistic ground state led better accounting of measured data..
109. F. Saiho, Tadahiro Kin, S. Hohara, Y. Yamashita, M. Imamura, G. Wakabayashi, Nobuo Ikeda, Yusuke Uozumi, M. Matoba, N. Koori, Response and efficiency of stacked GSO(Ce) spectrometer to intermediate-energy deuterons, Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 10.1016/j.nima.2004.07.292, 537, 3, 594-599, 2005.02, Performances of a stacked GSO(Ce) spectrometer were investigated in terms of the light output and the peak-to-tail efficiency for deuterons of intermediate energies. Experiments were conducted at the Research Center for Nuclear Physics (RCNP) of Osaka University by using monoenergetic deuterons from pd and αd scatterings. The results are indispensable to determine energy-angle double differential cross-sections of deuteron production reactions induced by 400 MeV protons..
110. Yusuke Uozumi, Fuminobu Saiho, Tadahiro Kin, Shinya Hohara, Syouzo Aoki, Bin Cao, Junzi Tanaka, Genichiro Wakabayashi, Masaru Matoba, Masahiro Nakano, Takashi Maki, Norihiko Kooru, Proton production cross sections for reactions induced by 300- and 392-mev protons, journal of nuclear science and technology, 10.1080/00223131.2002.10875121, 39, 385-388, 2002.08, Multistep direct processes in proton production reactions were investigated with proton beams of 300 and 392 MeV bombarding five target nuclei, 12C, 160, 27Al, 93Nb and 197Au. Energy spectra were measured at eleven laboratory angles from 19 deg to 104 deg and compared with two theoretical models, the quantum molecular dynamics and the intranuclear cascade model..
111. S. Hohara, K. Ikeda, Tadahiro Kin, F. Saiho, Yusuke Uozumi, M. Matoba, A research for the relation between the gas scintillation light yield and the gas pressure in the wavelength range from visible to infrared, 2001 IEEE Nuclear Science Symposium Conference Record IEEE Nuclear Science Symposium and Medical Imaging Conference, 1, 325-327, 2002.06, We investigated light yield of primary scintillation from interactions of alpha particles and gaseous materials under different conditions. The scintillation lights were detected with photomultiplier tubes. The largest yields were obtained under gas pressure of 200 to 300 hPa. We proposed a simple method to deduce photon numbers of primary scintillation..