| 1. |
STATUS REPORT OF CENTER FOR ACCELERATOR AND BEAM APPLIED SCIENCE OF KYUSHU UNIVERSITY IN 2020. |
| 2. |
STATUS REPORT OF CENTER FOR ACCELERATOR AND BEAM APPLIED SCIENCE OF KYUSHU UNIVERSITY IN 2021. |
| 3. |
5a-E-5 analyzing power measurements of quasifree (p, n) reactions. |
| 4. |
4p-J-12 Analizing Power Measurements in Deuteron Elastic Scattering (E_d=270MeV). |
| 5. |
4p-J-1 Spin and isospin excitation observed in the (d, ^2He) reactions on light nuclei. |
| 6. |
4a-J-3 Test measurement of Spinflip Probability for the ^Mg(p, nγ)^Al Reaction. |
| 7. |
4a-J-2 Measurement of the Transverse Spin-Transfer Coefficients D_(0°) for (p^^→, n^^→) Reactions at 300MeV. |
| 8. |
The development of the PIS at RIKEN. |
| 9. |
30p-PSA-29 Spin and Isospin excitation from the (d, ^2He) reaction s on light nuclei II. |
| 10. |
30p-PSA-28 Tensor Analyzing Power of the ^C(d, ^2He)^B Reaction at 270 MeV. |
| 11. |
30p-PSA-24 Abroad bump observed in the (p, n) reaction at intermediate energies. |
| 12. |
30p-PSA-23 Spin-Isospin Excitations in Nuclei via the Polarization Transfer Measurements. |
| 13. |
28a-Y-7 Measurements of Analyzing Powers for (p, n) Quasi Elastic Scatterings. |
| 14. |
28a-Y-3 Measurement of Analyzing Powers for the d+p elastic Scattering at E_d=270MeV. |
| 15. |
The ^Al(d, ^2He)reaction at 270MeV. |
| 16. |
Measurements of analyzing powers for(p, p')quasi elastic scatterings. |
| 17. |
Swinger & NSR system in the RCNP neutron TOF facility. |
| 18. |
30a-SF-3 Development of deuteron polarimeter. |
| 19. |
27p-SF-3 Deuteron Elastic Breakup at Intermediate Energies. |
| 20. |
若狭 智嗣, 酒井 英行, 岡村 弘之, 大津 秀暁, 藤田 哲史, 野中 敬正, 石田 悟, 坂本 成彦, 上坂 友洋, 佐藤 義輝, 大西 哲也, Yokoyama G., Greenfield M.B., 畑中 吉治, 8a-G-7 準弾性散乱の全偏極移行量測定, 日本物理学会講演概要集. 秋の分科会, Vol.1996, No.1, p.126, 1996.09. |
| 21. |
28p-YT-8 Spin-Isospin excitation in sd shell nuclei. |
| 22. |
28p-YT-2 Polarization transfer in ^2H(p^^→, n^^→)pp at 346 MeV. |
| 23. |
21a-D-5 Measurement of the Spin Transfer Observables via the ^C(d, d') Reaction. |
| 24. |
Study of nuclear spin responses from polarization transfer. |
| 25. |
Focal Plane Polarimeter for 80-90 MeV Protons from (p^^→,pp^^→)Reactions. |
| 26. |
Measurement of the ^Si(d^^→,^^^→)reaction at E_d = 270MeV.. |
| 27. |
若狭 智嗣, 酒井 英行, 岡村 弘之, 大津 秀暁, 野中 敬正, 大西 哲哉, 矢向 謙太郎, 関口 仁子, 藤田 哲史, 上坂 友洋, 佐藤 義輝, 石田 悟, 坂本 成彦, GREENFIELD M.B, 畑中 吉治, 30a-G-2 ^Zr(p,n)反応の全スピン移行及びパリティ分離, 日本物理学会講演概要集, Vol.53, No.1, p.49, 1998.03. |
| 28. |
Study of Effective NN Interaction in Nuclei via the ^Si(pp^^→,n^^→)^P(6^-)Reaction at 295 Mev. |
| 29. |
29a-PS-117 Depolarization parameters in various host materials through the β-decay of polarized 12^N nucleus produced by the ^C(p^^→, ^N^^→)n reaction. |
| 30. |
28a-YJ-8 Study of Effective NN Interaction in Nuclei via the ^Si(p^^→, n^^→)^P(6^-) Reaction at 295 MeV II. |
| 31. |
28a-YJ-3 Measurement of the cross sections and the analyzing powers for the d-p elastic scattering at E_d=270MeV. |
| 32. |
26aSK-2 Polarization Observables in d+^3He Backward Elastic Scattering. |
| 33. |
23aSK-10 Determination of S-factors by (p, 2p)reactions. |
| 34. |
Measurement of the cross sections and the analyzing powers for the d-p elastic scattering at intermediate energies. |
| 35. |
Measurement of the Polarization Transfer Coefficients, K^_, for d-p Elastic Scattering at E_d=270 MeV. |
| 36. |
Measurement of (p, 2p) reaction from ^Li, ^C, ^Ca at 1 GeV. |
| 37. |
Development of deuteron beam polarimeter at E_d=200MeV. |
| 38. |
Construction of a (n,p) facility at RCNP. |
| 39. |
Multipole Decomposition Analysis of GSDR Region of ^C(p,n)^N at, 197MeV. |
| 40. |
Search for supernarrow dibaryons by p+d scattering. |
| 41. |
Test experiment of tile high resolution (p,n) reaction at 300MeV. |
| 42. |
The high resolution study of Gamow-Teller states in intermediate enrgy ^Cl(^3He, t)^Ar. |
| 43. |
Measurement of differential cross sections and Ay of pd breakup reaction at E_p^^^→=250MeV. |
| 44. |
Measurement of deep hole states in ^Ca by 392 MeV (p, 2p) reaction. |
| 45. |
30pZB-7 Detailed Distributions of Gamow-Teller Strengths in T=1 fp Shell Nuclei. |
| 46. |
30pZB-6 Measurement of energy-dependence of A_ anomaly in p - d radiative capture. |
| 47. |
30pZB-3 Search for super narrow dibaryons via the p+d scattering. |
| 48. |
30pZB-12 Precise measurement of Gamow-Teller unit cross section at 300 MeV. |
| 49. |
28aSA-10 Polarization caliblation of polarized ^3He target. |
| 50. |
27aSA-2 Study of three nucleon force effect via dp scattering at 200 MeV. |
| 51. |
25aWH-4 Measurement of complete set of polarization transfer coefficients for the ^Si(p^^→,n^^→)^P(6^-,T=1) reaction. |
| 52. |
30pWD-3 Study of Nuclear Correlation Effects via ^C(p^^→,n^^→)^N(g.s.;1^+). |
| 53. |
30pWD-1 Experimental study of a relativistic effect by the ^Pb(p,2p) reaction at E_p=392MeV. |
| 54. |
27aWD-5 Study of Coulomb-breakup mechanism of weakly bound projectiles using deuteron. |
| 55. |
28aSD-6 Study of Nuclear Correlation Effects via Gamow-Teller Transition ^C(p^^→,n^^→)^N(g.s.;1^+). |
| 56. |
27aSE-11 Development of polarized ^3He target with metastable exchange. |
| 57. |
21pYF-8 Measurement of complete set of polarization transfer coefficients for ^3He(p,n) reaction. |
| 58. |
21pYF-6 Study of Spin Dipole Resonances in ^N by ^C(p^^→,n^^→) reaction. |
| 59. |
21pYF-2 Experimental search for anomaly in pdbreak-up cross section. |
| 60. |
21pYF-1 The study of the three-nucleon force effects via the D(p,pp) breakup reaction at 250MeV. |
| 61. |
21aYF-4 High resolution study of Gamow-Teller transitions in pf-shell nuclei. |
| 62. |
25pZF-3 Pions in Nuclei studied by isovector nucleon-induced reactions. |
| 63. |
24pZG-4 Study of Nuclear Correlation Effects via Gamow-Teller Transition ^C(p^^→,n^^→)^N(g.s.;1^+)II. |
| 64. |
24pZG-3 Study of the double beta decay process of ^Ca via the ^Ti(n, p)^Sc reaction. |
| 65. |
24pZG-2 Transition Strength of ^Cd. |
| 66. |
22aSD-10 A test measurement of (p,pn) reaction at E_p=392MeV. |
| 67. |
21pBH-7 Study of Spin-Dipole Resonances in ^F via ^O(p^^→,n^^→)^F. |
| 68. |
21pBH-3 Measurement of d^^→+p elastic scattering at 250MeV/nucleon and Three Nucleon Force. |
| 69. |
21pBH-2 The discrepancy of ^2H(p,pp)n cross sections at E_p=250MeV. |
| 70. |
11aSK-7 Development of Beam Transport for the search of the Electron EDM. |
| 71. |
28aGK-9 Development of high-intensity Fr factory for search of electric EDM. |
| 72. |
26aGK-6 Study of Spin-Dipole Strengths in ^N via ^C(p^^→,n^^→) Reaction. |
| 73. |
17aSZ-6 Future perspective of precise nuclear physics. |
| 74. |
25pXD-7 Development of high intensity alkali atomic beam for search of electron EDM. |
| 75. |
13pSC-4 Development of external field application system for electron EDM measurement. |
| 76. |
13aSB-4 The study of the proton spin-orbit splitting in ^O via the (pol p,2p) reaction. |
| 77. |
T. Wakasa, K. Ogata, and T. Noro, Proton-induced knockout reactions with polarized and unpolarized beams, Prog. Part. Nucl. Phys., 2017.06, Proton-induced knockout reactions provide a direct means of studying the single particle or cluster structures of target nuclei. In addition, these knockout reactions are expected to play a unique role in investigations of the effects of the nuclear medium on nucleon– nucleon interactions as well as the properties of nucleons and mesons. However, due to the nature of hadron probes, these reactions can suffer significant disturbances from the nuclear surroundings and the quantitative theoretical treatment of such processes can also be challenging. In this article, we review the experimental and theoretical progress in this field, particularly focusing on the use of these reactions as a spectroscopic tool and as a way to examine the medium modification of nucleon–nucleon interactions. With regard to the former aspect, the review presents a semi-quantitative evaluation of these reactions based on existing experimental data. In terms of the latter point, we introduce a significant body of evidence that suggests, although does not conclusively prove, the existence of medium effects. In addition, this paper also provides information and comments on other related subjects.. |
| 78. |
九州大学加速器実験室の廃止. |
| 79. |
186.6MeV/nucleon重陽子‐陽子弾性散乱における重陽子偏極分解能測定と三体力. |
| 80. |
パリティ移行核反応による原子核の0-状態の研究 II. |
| 81. |
フランシウム源開発に向けたアルカリ原子の光誘起脱離. |
| 82. |
偏極移行測定による双極子励起モードの研究. |
| 83. |
冷却フランシウム原子によるEDM探索技術の開発. |
| 84. |
電子EDM探索に向けた冷却原子を用いたラムゼーフリンジの観測. |
| 85. |
28aTE-10 Optical dipole trap towards the electron EDM search using francium atom. |
| 86. |
28pTA-2 Spectroscopy of single proton hole states in nitrogen isotopes via the quasi-elastic ^AO(p, 2p) reaction. |
| 87. |
不安定核研究のための高位置分解能中性子検出器の開発. |
| 88. |
Laser-cooled radioactive atoms factory for a search for the electron electric dipole moment using francium. |
| 89. |
26aHA-2 Study of symmetry energy and neutron skin thickness from anti-analog giant dipole resonance in ^Pb. |
| 90. |
26aHA-3 Measurement of all deuteron analyzing powers for deuteron-proton elastic scattering at 294MeV/nucleon. |
| 91. |
26aHA-5 (p,n)IAS reaction on Sn isotopes at 170MeV. |
| 92. |
27pHB-12 Development of the ion to neutral atom converter for the search of the electron EDM with Francium. |
| 93. |
T. Wakasa, M. Okamoto, M. Takaki, M. Dozono, K. Hatanaka, M. Ichimura, T. Noro, H. Okamura, Y. Sakemi, Complete set of polarization transfer observables for the O-16((p)over-right-arrow, (n)over-right-arrow) F-16 reaction at 296 MeV and 0 degrees, PHYSICAL REVIEW C, 10.1103/PhysRevC.84.014614, Vol.84, No.1, 2011.07, We report measurements of the cross section and a complete set of polarization transfer observables for the O-16((p) over right arrow,(n) over right arrow) F-16 reaction at a bombarding energy of T-p = 296 MeV and a reaction angle of theta(lab) = 0 degrees. The data are compared with distorted-wave impulse approximation calculations employing the large configuration-space shell-model (SM) wave functions. The well-known Gamow-Teller and spin-dipole (SD) states at excitation energies of E-x less than or similar to 8 MeV have been reasonably reproduced by the calculations except for the spin-parity J(pi) = 2(-) state at E-x = 5.86 MeV. The SD resonance at E-x similar or equal to 9.5 MeV appears to have more J(pi) = 2(-)strength than J(pi) = 1(-) strength, consistent with the calculations. The data show significant strength in the spin-longitudinal polarized cross section I D-L (0 degrees) at E-x similar or equal to 15 MeV, which indicates the existence of the J(pi) = 0(-) SD resonance as predicted in the SM calculations.. |
| 94. |
K. Sekiguchi, H. Okamura, N. Sakamoto, H. Suzuki, M. Dozono, Y. Maeda, T. Saito, S. Sakaguchi, H. Sakai, M. Sasano, Y. Shimizu, T. Wakasa, K. Yako, H. Witala, W. Gloeckle, J. Golak, H. Kamada, A. Nogga, Three nucleon force effects in intermediate-energy deuteron analyzing powers for dp elastic scattering, PHYSICAL REVIEW C, 10.1103/PhysRevC.83.061001, Vol.83, No.6, 2011.06, A complete high precision set of deuteron analyzing powers for elastic deuteron- proton (dp) scattering at 250 MeV/nucleon (MeV/N) has been measured. The new data are presented together with data from previous measurements at 70, 100, 135 and 200 MeV/N. They are compared with the results of three- nucleon (3N) Faddeev calculations based on modern nucleon- nucleon (NN) potentials alone or combined with two models of three nucleon forces (3NFs): the Tucson-Melbourne 99 (TM99) and Urbana IX. At 250 MeV/N large discrepancies between pure NN models and data, which are not resolved by including 3NFs, were found at c. m. backward angles of theta(c.m). greater than or similar to 120 degrees for almost all the deuteron analyzing powers. These discrepancies are quite similar to those found for the cross section at the same energy. We found small relativistic effects that cannot resolve the discrepancies with the data indicating that other, short- ranged 3NFs are required to obtain a proper description of the data.. |
| 95. |
Spin-dipole strengths and tensor correlation effects for ${}^{208}{
m Pb}(p,n)$ at 295 MeV
We performed the multipole decomposition analysis (MDA) for the ${}^{208}{
m
Pb}(p,n)$ data in order to obtain the spin-dipole (SD) strengths separated into
each $Delta J^{pi}$ contribution $dB({
m SD}_{Delta
J^{pi } };omega)/domega$.
The random phase approximation (RPA calculations reproduce the total SD
strength reasonably well, whereas some discrepancies are found for separated SD
strength.
The centroids of the resonances are slightly lower and higher than the
theoretical predictions for $1^-$ and $2^-$, respectively.
These softening and hardening effects observed in $1^-$ an.... |
| 96. |
M. Dozono, T. Wakasa, E. Ihara, S. Asaji, K. Fujita, K. Hatanaka, M. Ichimura, T. Ishida, T. Kaneda, H. Matsubara, Y. Nagasue, T. Noro, Y. Sakemi, Y. Shimizu, H. Takeda, Y. Tameshige, A. Tamii, Y. Yamada, Polarization transfer measurements for C-12(p,n)N-12(g.s.,1(+)) at 296 MeV and nuclear correlation effects, PHYSICAL REVIEW C, 10.1103/PhysRevC.80.024319, Vol.80, No.2, 2009.08, Differential cross sections and complete sets of polarization observables are presented for the Gamow-Teller C-12(p,n)N-12(g.s.,1(+)) reaction at a bombarding energy of 296 MeV with momentum transfers q of 0.1 to 2.2 fm(-1). The polarization transfer observables are used to deduce the spin-longitudinal cross section, IDq, and spin-transverse cross sections, IDp and IDn. The data are compared with calculations based on the distorted-wave impulse approximation (DWIA) using shell-model wave functions. Significant differences between the experimental and theoretical results are observed for all three spin-dependent IDi at momentum transfers of q greater than or similar to 0.5 fm(-1), suggesting the existence of nuclear correlations beyond the shell model. We also performed DWIA calculations employing random-phase approximation (RPA) response functions and found that the observed discrepancy is partly resolved by the pionic and rho-mesonic correlation effects.. |
| 97. |
E. Ihara, T. Wakasa, M. Dozono, K. Hatanaka, T. Imamura, M. Kato, S. Kuroita, H. Matsubara, T. Noro, H. Okamura, K. Sagara, Y. Sakemi, K. Sekiguchi, K. Suda, T. Sueta, Y. Tameshige, A. Tamii, H. Tanabe, Y. Yamada, Cross sections and analyzing powers for (p, n) reactions on He-3 and He-4 at 346 MeV, PHYSICAL REVIEW C, 10.1103/PhysRevC.78.024607, Vol.78, No.2, 2008.08, The cross sections and analyzing powers for (p, n) reactions He-3 and He-4 have been measured at a bombarding energy of T-p = 346 MeV and reaction angles of theta(lab) = 9.4 degrees-27 degrees. The energy transfer spectra for He-3(p, n) at large theta(lab) (>= 16 degrees) are dominated by quasielastic contributions and can be reasonably reproduced by plane-wave impulse approximation (PWIA) calculations for quasielastic scattering. By contrast, the known L = 1 resonances in Li-4 are clearly observed near the threshold in the He-4(p, n) spectra. Because these contributions are remarkable at small angles, the energy spectra are significantly different from those expected for quasielastic scattering. The data are compared with the PWIA calculations, and it is found that the quasielastic contributions are dominant at large theta(lab) (>= 22 degrees). The nuclear correlation effects on the quasielastic peak for He-4(p, n) are also discussed.. |
| 98. |
T. Wakasa, E. Ihara, M. Dozono, K. Hatanaka, T. Imamura, M. Kato, S. Kuroita, H. Matsubara, T. Noro, H. Okamura, K. Sagara, Y. Sakemi, K. Sekiguchi, K. Suda, T. Sueta, Y. Tameshige, A. Tamii, H. Tanabe, Y. Yamada, Complete set of polarization transfer coefficients for the He-3(p, n) reaction at 346 MeV and 0 degrees, PHYSICAL REVIEW C, 10.1103/PhysRevC.77.054611, Vol.77, No.5, 2008.05, We report measurements of the cross-section and a complete set of polarization transfer coefficients for the He-3(p, n) reaction at a bombarding energy T-p = 346 MeV and a reaction angle theta(lab) = 0 degrees. The data are compared with the corresponding free nucleon-nucleon values on the basis of the predominance of quasielastic scattering processes. Significant discrepancies have been observed in the polarization transfer D-LL(0 degrees), which are presumably the result of the three-proton T = 3/2 resonance. The spin-parity of the resonance is estimated to be 1/2(-), and the distribution is consistent with previous results obtained for the same reaction at T-p = 48.8 MeV.. |
| 99. |
Y. Maeda, M. Segawa, T. Ishida, A. Kacharava, M. Nomachi, Y. Shimbara, Y. Sugaya, K. Tamura, T. Yagita, K. Yasuda, H. P. Yoshida, C. Wilkin, Differential cross section and analyzing power of the ${vec p}p{ o}ppπ^0$ reaction at a beam energy of 390 MeV, Phys.Rev.C77:044004,2008, 10.1103/PhysRevC.77.044004, Vol.77, No.4, 2008.04, The differential cross section and analyzing power $A_y$ of the ${vec
p}p{ o}pp{pi}^0$ reaction have been measured at RCNP in coplanar geometry at
a beam energy of 390 MeV and the dependence on both the pion emission angle and
the relative momentum of the final protons have been extracted. The angular
variation of Ay for the large values of the relative momentum studied here
shows that this is primarily an effect of the interference of pion s- and
p-waves and this interference can also explain the momentum dependence. Within
the framework of a very simple model, these results would sugge.... |
| 100. |
Ema Ihara, Tomotsugu Wakasa, Masanori Dozono, Yasuhiro Sakemi, High rate production of polarized He-3 with meta-stability exchange method, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 10.1143/JPSJ.77.025002, Vol.77, No.2, 2008.02, Keywords: polarized 3He, meta-stability exchange, infrared laser. |
| 101. |
Masanori Dozono, Tomotsugu Wakasa, Ema Ihara, Shun Asaji, Kunihiro Fujita, Kichiji Hatanaka, Takashi Ishida, Takaaki Kaneda, Hiroaki Matsubara, Yuji Nagasue, Tetsuo Noro, Yasuhiro Sakemi, Yohei Shimizu, Hidemitsu Takeda, Yuji Tameshige, Atsushi Tamii, Yukiko Yamada, Complete set of polarization transfer observables for the C-12(p, n) reaction at 296 MeV and 0 degrees, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 10.1143/JPSJ.77.014201, Vol.77, No.1, 2008.01, A complete set of polarization transfer observables has been measured for the C-12(p, n) reaction at T-p = 296 MeV and theta(1ab) = 0 degrees. The measured polarization transfer observables indicate that the spin-dipole resonance at E-x similar or equal to 7 MeV has greater 2(-) strength than 1(-) strength, which is consistent with recent experimental and theoretical studies. The total spin transfer Sigma(0 degrees) deduced from the polarization transfer observables indicates a predominance of the spin-flip strength in the continuum. The exchange tensor interaction at a large momentum transfer of Q similar or equal to 3.6 fm(-1) is discussed.. |
| 102. |
T. Wakasa, M. Dozono, E. Ihara, S. Asaji, K. Fujita, K. Hatanaka, M. Ichimura, T. Ishida, T. Kaneda, H. Matsubara, Y. Nagasue, T. Noro, Y. Sakemi, Y. Shimizu, H. Takeda, Y. Tameshige, A. Tamii, Y. Yamada, Study of nuclear correlation effects via C-12((p)over-right-arrow, (n)over-right-arrow)N-12(g.s., 1(+)) at 296 MeV, PHYSICS LETTERS B, 10.1016/j.physletb.2007.10.017, Vol.656, No.1-3, pp.38-44, 2007.11, We report measurements of the cross section and a complete set of polarization observables for the Gamow-Teller C-12((p) over right arrow, (n) over right arrow)N-12(g.s., 1(+)) reaction at a bombarding energy of 296 MeV The data arc compared with distorted wave impulse approximation calculations employing transition form factors normalized to reproduce the observed beta-decay f t value. The cross section is significantly under-predicted by the calculations at momentum transfers q greater than or similar to 0.5 fm(-1). The discrepancy is partly resolved by considering the non-locality of the nuclear mean field. However, the calculations still under-predict the cross section at large momentum transfers of q similar or equal to 1.6 fm(-1). We also performed calculations employing random phase approximation response functions and found that the observed enhancement can be attributed in part to pionic correlations in nuclei. (c) 2007 Elsevier B.V. All rights reserved.. |
| 103. |
T. Wakasa, E. Ihara, K. Fujita, Y. Funaki, K. Hatanaka, H. Horiuchi, M. Itoh, J. Kamiya, G. Roepke, H. Sakaguchi, N. Sakamoto, Y. Sakemi, P. Schuck, Y. Shimizu, M. Takashina, S. Terashima, A. Tohsaki, M. Uchida, H. P. Yoshida, M. Yosoi, New candidate for an alpha cluster condensed state in O-16(alpha,alpha ') at 400 MeV, PHYSICS LETTERS B, 10.1016/j.physletb.2007.08.016, Vol.653, No.2-4, pp.173-177, 2007.09, Inelastic a scattering on 160 is studied at 400 MeV using an ice target. Near the 4c alpha breakup threshold of 14.4 MeV, a broad peak is observed at an excitation energy of 13.6 +/- 0.1 MeV with a width of 0.6 +/- 0.2 MeV. The spin-parity is estimated to be 0(+) from the momentum-transfer dependence. The observed width is significantly larger than that of the 0(+) state at 12.0 MeV with the alpha + C-12 structure, indicating a well-developed a cluster structure. The magnitude of the cross section is sensitive to the density distribution of the constituent alpha clusters. The observed cross section is consistent with the theoretical prediction for the a cluster condensed state, characterized by its dilute density distribution with a large root-mean-square radius. (c) 2007 Elsevier B.V. All rights reserved.. |
| 104. |
T. Kawabata, H. Akimune, H. Fujita, Y. Fujita, M. Fujiwara, K. Hara, K. Hatanaka, M. Itoh, Y. Kanada-En'yo, S. Kishi, K. Nakanishi, H. Sakaguchi, Y. Shimbara, A. Tamii, S. Terashima, M. Uchida, T. Wakasa, Y. Yasuda, H. P. Yoshida, M. Yosoi, $2α+t$ cluster structure in $^{11}$B, Phys.Lett.B646:6-11,2007, 10.1016/j.physletb.2006.11.079, Vol.646, No.1, pp.6-11, 2007.03, The cluster structures of the excited states in $^{11}$B are studied by
analyzing the isoscalar monopole and quadrupole strengths in the
$^{11}$B($d$,$d'$) reaction at $E_d=200$ MeV. The excitation strengths are
compared with the predictions by the shell-model and antisymmetrized
molecular-dynamics (AMD) calculations. It is found that the large monopole
strength for the $3/2^-_3$ state at $E_x=8.56$ MeV is well described by the AMD
calculation and is an evidence for a developed $2alpha+t$ cluster structure.. |
| 105. |
Y. Fujita, I. Hamamoto, H. Fujita, Y. Shimbara, T. Adachi, G. P. A. Berg, K. Fujita, K. Hatanaka, J. Kamiya, K. Nakanishi, Y. Sakemi, Y. Shimizu, M. Uchida, T. Wakasa, M. Yosoi, Identification of the [202]3/2 deformed band in mirror nuclei Mg-25 and Al-25 and implications for unstable nuclei, PHYSICA SCRIPTA, 10.1088/0031-8949/2006/T125/047, Vol.T125, pp.194-195, 2006.07, Fifty years after its prediction, the highest-lying [ 2 0 2] 3) 2 orbit among the six Nilsson single-particle orbits originating from the sd shell in prolately deformed nuclei and the rotational band on this orbit were identified. The band members were observed in Al-25 at excitation energies of 6-7.5MeV in a high-resolution Mg-25(He-3,t) charge-exchange reaction at 0 degrees having a strong selectivity for Gamow-Teller transitions. In comparison with the analogous M1 transitions in Mg-25, the J(pi) = 3/+ band-head state and the excited 5/+ and 7/2+ members were clearly assigned.. |
| 106. |
Y Kalmykov, T Adachi, GPA Berg, H Fujita, K Fujita, Y Fujita, K Hatanaka, J Kamiya, K Nakanishi, P von Neumann-Cosel, VY Ponomarev, A Richter, N Sakamoto, Y Sakemi, A Shevchenko, Y Shimbara, Y Shimizu, FD Smit, T Wakasa, J Wambach, M Yosoi, Fine structure of the Gamow-Teller resonance in Nb-90 and level density of 1(+) states, PHYSICAL REVIEW LETTERS, 10.1103/PhysRevLett.96.012502, Vol.96, No.1, 2006.01, The fine structure of the Gamow-Teller resonance in a medium-heavy nucleus is observed for the first time in a high-resolution Zr-90(He-3,t)Nb-90 experiment at the Research Center for Nuclear Physics, Osaka. Using a novel wavelet analysis technique, it is possible to extract characteristic energy scales and to quantify their relative importance for the generation of the fine structure. This method combined with the selectivity of the reaction permits an extraction of the level density of 1(+) states in Nb-90.. |
| 107. |
T Wakasa, M Ichimura, H Sakai, Unified analysis of spin isospin responses of nuclei, PHYSICAL REVIEW C, 10.1103/PhysRevC.72.067303, Vol.72, No.6, 2005.12, We investigate the Gamow-Teller (GT) response functions at a momentum transfer of q=0 fm(-1) and the pionic response functions for quasielastic scattering (QES) at q approximate to 1.7 fm(-1) using the continuum random phase approximation with the pi+rho+g(') model interaction. The Landau-Migdal (LM) parameters, g(NN)(') and g(N Delta)('), are estimated by comparing the calculations with recent experimental data. The peak of the GT resonance and the pionic response functions below the QES peak constrain g(NN)('), whereas the quenching of the GT total strength and the enhanced pionic strength around the QES peak provide information about g(N Delta)('). We obtained g(NN)(')=0.6 +/- 0.1 and g(N Delta)(')=0.35 +/- 0.16 at q=0 fm(-1) and g(NN)(')=0.7 +/- 0.1 and g(N Delta)(')=0.3 +/- 0.1 at q approximate to 1.7 fm(-1). These results indicate that the q dependence of the LM parameters is weak.. |
| 108. |
K Sekiguchi, H Sakai, H Witala, W Glockle, J Golak, K Hatanaka, M Hatano, K Itoh, H Kamada, H Kuboki, Y Maeda, A Nogga, H Okamura, T Saito, N Sakamoto, Y Sakemi, M Sasano, Y Shimizu, K Suda, A Tamii, T Uesaka, T Wakasa, K Yako, Resolving the discrepancy of 135 MeV pd elastic scattering cross sections and relativistic effects, PHYSICAL REVIEW LETTERS, 10.1103/PhysRevLett.95.162301, Vol.95, No.16, 2005.10, Three precise measurements for elastic pd scattering at 135 MeV/A have been performed with the three different experimental setups. The cross sections are described well by the theoretical predictions based on modern nucleon-nucleon forces combined with three-nucleon forces. Relativistic Faddeev calculations show that relativistic effects are restricted to backward angles. This result supports the two measurements recently reported by RIKEN and contradicts the KVI data.. |
| 109. |
T Wakasa, Y Hagihara, M Sasano, S Asaji, K Fujita, K Hatanaka, T Ishida, T Kawabata, H Kuboki, Y Maeda, T Noro, T Saito, H Sakai, Y Sakemi, K Sekiguchi, Y Shimizu, A Tamii, Y Tameshige, K Yako, Performance of the neutron polarimeter NPOL3 for high resolution measurements, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 10.1016/j.nima.2005.03.151, Vol.547, No.2-3, pp.569-582, 2005.08, We describe the neutron polarimeter NPOL3 for the measurement of polarization transfer observables D-ij with a typical high resolution of similar to 300 keV at Tn similar or equal to 200 MeV. The NPOL3 system consists of three planes of neutron detectors. The first two planes for neutron polarization analysis are made of 20 sets of one-dimensional position-sensitive plastic scintillation counters with a size of 100 cm x 10 cm x 5 cm, and they cover the area of 100 x 100 cm(2). The last plane for detecting doubly scattered neutrons or recoiled protons is made of the two-dimensional position-sensitive liquid scintillation counter with a size of 100 cm, x 100 cm x 10 cm. The effective analyzing powers A(yeff) and double scattering efficiencies epsilon(D.S.) were measured by using the three kinds of polarized neutrons from the H-2(p, n)pp, Li-6(p, n)Be-6(g.s.), and C-12(p, n)N-12(g.s.) reactions at T-P = 198 MeV. The performance of NPOL3 defined as epsilon(D.S.)(A(yeff))(2) are similar to that of the Indiana Neutron POLarimeter by taking into account for the counter configuration difference between these two neutron polarimeters. (c) 2005 Elsevier B.V. All rights reserved.. |
| 110. |
K Yako, H Sakai, MB Greenfield, K Hatanaka, M Hatano, J Kamiya, H Kato, Y Kitamura, Y Maeda, CL Morris, H Okamura, J Rapaport, T Saito, Y Sakemi, K Sekiguchi, Y Shimizu, K Suda, A Tamii, N Uchigashima, T Wakasa, Determination of the Gamow-Teller quenching factor from charge exchange reactions on Zr-90, PHYSICS LETTERS B, 10.1016/j.physletb.2005.04.032, Vol.615, No.3-4, pp.193-199, 2005.06, Double differential cross sections between 0 degrees-12 degrees were measured for the Zr-90(n, p) reaction at 293 MeV over a wide excitation energy range of 0-70 MeV. A multipole decomposition technique was applied to the present data as well as the previously obtained 90Zr(p, n) data to extract the Gamow-Teller (GT) component from the continuum. The GT quenching factor Q was derived by using the obtained total GT strengths. The result is Q = 0.88 +/- 0.06, not including an overall normalization uncertainty in the GT unit cross section of 16%. (c) 2005 Elsevier B.V. All rights reserved.. |
| 111. |
Evidence of a Pionic Enhancement Observed in $^{16}O(p,p') ^{16}O(0^-,T=1)$ at 295 MeV
The cross section of the ${}^{16}{
m O}(p,p'){}^{16}{
m O}(0^-,T=1)$
scattering was measured at a bombarding energy of 295 MeV in the momentum
transfer range of $1.0 mathrm{fm^{-1 } }$ $le$ $q_{
m c.m.}$ $le$ $2.1
mathrm{fm^{-1 } }$.
The isovector $0^-$ state at $E_x$ = 12.8 MeV is clearly separated from its
neighboring states owing to the high energy resolution of about 30 keV.
The cross section data were compared with distorted wave impulse
approximation (DWIA) calculations employing shell-model wave functions.
The observed cross sections around $q_{
m c.m.}$ $simeq$ $1.7 {
m
.... |
| 112. |
T Kawabata, H Akimune, H Fujimura, H Fujita, Y Fujita, M Fujiwara, K Hara, KY Hara, K Hatanaka, T Ishikawa, M Itoh, J Kamiya, S Kishi, M Nakmura, K Nakanishi, T Noro, H Sakaguchi, Y Shimbara, H Takeda, A Tamii, S Terashima, H Toyokawa, M Uchida, H Ueno, T Wakasa, Y Yasuda, HP Yoshida, M Yosoi, Isovector and isoscalar spin-flip M1 strengths in B-11, PHYSICAL REVIEW C, 10.1103/PhysRevC.70.034318, Vol.70, No.3, 2004.09, The B-11(He-3,t), and B-11(d,d(')), and B-11(p,p(')) reactions were measured at forward scattering angles including 0degrees to study the isovector and isoscalar spin-flip M1 strengths in B-11. The measured B-11(He-3,t) cross sections were compared with the results of the distorted-wave impulse-approximation (DWIA) calculation, and the Gamow-Teller (GT) strengths for low-lying states in C-11 were determined. The GT strengths were converted to the isovector spin-flip M1 strengths using the isobaric analog relations under the assumption of the isospin symmetry. The isoscalar spin-flip M1 strengths were obtained from the (d,d(')) analysis by assuming that the shape of the collective transition form factor with the same DeltaJ(pi) is similar in the B-11(d,d(')) and C-12(d,d(')) reactions. The obtained isovector and isoscalar strengths were used in the DWIA calculations for the B-11(p,p(')) reaction. The DWIA calculation reasonably well explains the present B-11(p,p(')) result. However, the calculated cross section for the 8.92-MeV 3/2(2)(-) state was significantly smaller than the experimental values. The transition strengths obtained in the shell-model calculations were found to be 20-50 % larger than the experimental strengths. The transition strengths for the neutrino induced reactions were estimated by using the isovector and isoscalar spin-flip M1 strengths. The present results are quantitatively in agreement with the theoretical estimation discussing the axial isoscalar coupling in the neutrino scattering process, and are useful in the measurement of the stellar neutrinos using the neutral- and charged-current reactions on B-11.. |
| 113. |
Y Fujita, Hamamoto, I, H Fujita, Y Shimbara, T Adachi, GPA Berg, K Fujita, K Hatanaka, J Kamiya, K Nakanishi, Y Sakemi, Y Shimizu, M Uchida, T Wakasa, M Yosoi, Evidence for the existence of the [202]3/2 deformed band in mirror nuclei Mg-25 and Al-25, PHYSICAL REVIEW LETTERS, 10.1103/PhysRevLett.92.062502, Vol.92, No.6, 2004.02, After 50 years of its prediction, the highest-lying [2 0 2]3/2 orbit among the six Nilsson single-particle orbits originating from the sd shells in prolately deformed nuclei and the rotational band on this orbit were identified. The band members were observed in Al-25 at excitation energies of 6-7.5 MeV in a high-resolution Mg-25(He-3,t) charge-exchange reaction at 0degrees having a strong selectivity for Gamow-Teller transitions. In the comparison with the analogous M1 transitions in Mg-25, the J(pi)=3/2(+) bandhead state and the excited 5/2(+) and 7/2(+) members were clearly assigned.. |
| 114. |
Y Shimbara, Y Fujita, T Adachi, GPA Berg, H Fujita, K Fujita, Hamamoto, I, K Hatanaka, J Kamiya, K Nakanishi, Y Sakemi, Y Shimizu, M Uchida, T Wakasa, M Yosoi, Suppression of Gamow-Teller and M1 transitions in deformed mirror nuclei Mg-25 and Al-25 - Direct observation of K selection rules, EUROPEAN PHYSICAL JOURNAL A, 10.1140/epja/i2003-10115-2, Vol.19, No.1, pp.25-31, 2004.01, The mirror nuclei Mg-25 and Al-25 are expected to have very similar structures. The Gamow-Teller (GT) transitions from the J(pi) = 5/2(+) ground state of Mg-25 to the excited states in Al-25 were studied by high-resolution measurements of the Mg-25(He-3,t) charge-exchange reaction at 0degrees and at 140 MeV/nucleon. Assuming the usual DeltaJ(pi) = 1(+) selection rule for the spin-isospin-type GT transitions, the states with J(pi) = 3/2(+), 5/2(+), and 7/2 (+) should be excited. However, of the more than ten states with these J(pi) values below 6 MeV excitation energy, only the 5/2 (+) ground state and the 7/2 (+) , 1.613 MeV state in Al-25 were strongly populated, while all other states were strongly suppressed. The analysis of M1 transitions in Mg-25 also suggested a very similar feature for the analogous M1 transitions. Both Mg-25 and Al-25 are known to be largely deformed, and most low-lying states can be interpreted in terms of one-particle quantum numbers in the deformed potential and the associated rotational spectra. The observed suppression can be explained in terms of the K quantum number selection rules that are inherent to axially deformed nuclei.. |
| 115. |
T Wakasa, GPA Berg, H Fujita, Y Fujita, K Hatanaka, K Hara, M Itoh, J Kamiya, T Kawabata, K Nagayama, T Noro, H Sakaguchi, Y Shimbara, Y Shinada, H Takeda, K Tamura, H Ueno, M Uchida, M Uraki, M Yosoi, New capabilities of the Grand Raiden spectrometer, NUCLEAR PHYSICS A, 10.1016/S0375-9474(03)01294-6, Vol.721, pp.1099C-1102C, 2003.06, A new beam line that can accomplish both lateral and angular dispersion matching with the Grand Raiden spectrometer was designed and constructed at RCNP. A resolution of about 30 keV and a scattering-angle resolution of about 5 mrad were achieved in the (He-3, t) reaction at T-3He = 420 MeV (140 MeV/A) and angles of 0degrees-3degrees. This high-resolution and good angle-resolution reaction enables us to study nuclear structure and fine structure of giant resonances with unprecedented precision.. |
| 116. |
GPA Berg, K Hatanaka, M Wiescher, H Schatz, T Adachi, AD Bacher, CC Foster, Y Fujita, H Fujita, K Fujita, J Gorres, C Herman, J Kamiya, N Sakamoto, Y Sakemi, Y Shimbara, Y Shimizu, EJ Stephenson, T Wakasa, M Yosoi, Resonance states in Mg-22 for reaction rates in the rp-process, NUCLEAR PHYSICS A, 10.1016/S0375-9474(03)00900-X, Vol.718, pp.608C-610C, 2003.05, Motivated by the need of spectroscopic data to better understand the astrophysical rp-process, we developed a new experimental method using the Grand Raiden magnet spectrometer to study proton rich nuclei with alpha and He-3 induced reactions. First results of the Mg-24(He-4,He-6)Mg-22 reaction at 206 MeV and 0degrees are presented, showing states relevant for resonant reaction rate calculations of the proton capture Na-21(p,gamma)Mg-22 and the Ne-18(alpha,p)Na-21 reaction which controls the break-out of the hot CNO cycles at X-ray burst conditions.. |
| 117. |
Y. Satou, S. Ishida, H. Sakai, H. Okamura, N. Sakamoto, H. Otsu, T. Uesaka, A. Tamii, T. Wakasa, T. Ohnishi, K. Sekiguchi, K. Yako, K. Suda, M. Hatano, H. Kato, Y. Maeda, J. Nishikawa, T. Ichihara, T. Niizeki, H. Kamada, W. Glöckle, H. Witała, Three-body dN interaction in the analysis of the 12C(d, d′) reaction at 270 MeV, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 10.1016/S0370-2693(02)02957-X, Vol.549, No.3-4, pp.307-313, 2002.12, We have measured the cross sections and analyzing powers Ay and Ayy for the elastic and inelastic scattering of deuterons from the 0+(g.s.), 2+(4.44 MeV), 3-(9.64 MeV), 1+(12.71 MeV), and 2-(18.3 MeV) states in 12C at an incident energy of 270 MeV. The data are compared with microscopic distorted-wave impulse approximation calculations where the projectile-nucleon effective interaction is taken from the three-nucleon t-matrix given by rigorous Faddeev calculations presently available at intermediate energies. The agreement between theory and data compares well with that for the (p, p′) reactions at comparable incident energies/nucleon. © 2002 Elsevier Science B.V. All rights reserved.. |
| 118. |
Analyzing power of the ${vec p}p o ppπ^0$ reaction at beam energy of 390 MeV
The analyzing power of ${vec p}p o pp{pi}^0$ reaction has been measured at
the beam energy of 390 MeV. The missing mass technique of final protons has
been applied to identify the $pi^0$ production event. The dependences of the
analyzing power on the pion emission-angle and the relative momentum of the
protons have beenobtained. The angular dependence could be decomposed by the
Legendre polynomial and the relative contribution of the $P_{21}$ to $P_{11}$
function is less than 20%. The P-state amplitude is found to be the dominant
component of the $pi$ production near the threshold. The.... |
| 119. |
T. Kawabata, H. Akimune, H. Fujimura, H. Fujita, Y. Fujita, M. Fujiwara, K. Hara, K. Hatanaka, K. Hosono, T. Ishikawa, M. Itoh, J. Kamiya, M. Nakamura, T. Noro, E. Obayashi, H. Sakaguchi, Y. Shimbara, H. Takeda, T. Taki, A. Tamii, H. Toyokawa, N. Tsukahara, M. Uchida, H. Ueno, T. Wakasa, K. Yamasaki, Y. Yasuda, H. P. Yoshida, M. Yosoi, Thin ice target for 16O(p,p′) experiment, Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 10.1016/S0168-9002(00)00992-X, Vol.459, No.1-2, pp.171-176, 2001.02, A method to prepare a windowless, self-supporting and low-cost ice target is described. The produced target was successfully used to measure the spectra of inelastic proton scattering from 16O. An ice target of about 30 mg/cm2 worked stably. The target thickness was monitored for 7 hours by measuring p+p elastic scattering and no meaningful variation of the thickness was observed. No obvious effect of contaminations due to the congelation of residual gases on the target was detected. Since a thin ice target was made, measurements of charged decay particles in coincidence with inelastically scattered particles are possible.. |
| 120. |
H Sakai, K Sekiguchi, H Witala, W Glockle, M Hatano, H Kamada, H Kato, Y Maeda, A Nogga, T Ohnishi, H Okamura, N Sakamoto, S Sakoda, Y Satou, K Suda, A Tamii, T Uesaka, T Wakasa, K Yako, Precise measurement of dp elastic scattering at 270 MeV and three-nucleon force effects, PHYSICAL REVIEW LETTERS, 10.1103/PhysRevLett.84.5288, Vol.84, No.23, pp.5288-5291, 2000.06, The cross section, the deuteron vector A(y)(d) and tensor analyzing powers A(ij), the polarization transfer coefficients K-ij(y'), and the induced polarization P-y' were measured for the dp elastic scattering at 270 MeV. The cross section and A(y)(d) are well reproduced by Faddeev calculations with modern data-equivalent nucleon-nucleon forces plus the Tucson-Melbourne three-nucleon force. In contrast, A(ij), K-ij(y'), or P-y' are not described by such calculations. These facts indicate the deficiencies in the spin dependence of the Tucson-Melbourne force and call for extended three-nucleon force models.. |
| 121. |
Reaction mechanism and characteristics of T_{20} in d + ^3He backward elastic scattering at intermediate energies
For backward elastic scattering of deuterons by ^3He, cross sections sigma
and tensor analyzing power T_{20} are measured at E_d=140-270 MeV. The data are
analyzed by the PWIA and by the general formula which includes virtual
excitations of other channels, with the assumption of the proton transfer from
^3He to the deuteron. Using ^3He wave functions calculated by the Faddeev
equation, the PWIA describes global features of the experimental data, while
the virtual excitation effects are important for quantitative fits to the
T_{20} data. Theoretical predictions on T_{20}, K_y^y (polarizatio.... |
| 122. |
T Ohnishi, H Sakai, H Okamura, S Ishida, H Otsu, N Sakamoto, T Uesaka, T Wakasa, Y Satou, S Fujita, T Nonaka, EJ Stephenson, Measurement of a complete set of analyzing powers for deuteron elastic scattering from Ca-40 at 270 MeV and an investigation of tensor potentials (vol 438, pg 27, 1998), PHYSICS LETTERS B, Vol.458, No.4, p.564, 1999.07. |
| 123. |
Resolution of Quenching Problem for Gamow-Teller Giand Resonance. |
| 124. |
N Sakamoto, H Okamura, T Uesaka, S Ishida, H Otsu, T Wakasa, Y Satou, T Niizeki, K Katoh, T Yamashita, K Hatanaka, Y Koike, H Sakai, Measurement of the vector and tensor analyzing powers for the d-p elastic scattering at E(d)=270 MeV, PHYSICS LETTERS B, 10.1016/0370-2693(95)01398-9, Vol.367, No.1-4, pp.60-64, 1996.01, The differential cross sections and the vector and tensor analyzing powers A(y), A(yy), A(xx), and A(xz) for the d-p elastic scattering were measured at E(d)(lab) = 270 MeV over the c.m. angular range from 57 degrees to 138 degrees. The data are compared with a Faddeev calculation. A good description is obtained for all components of the analyzing powers, while a discrepancy of about 30% is found in the cross section around theta(c.m.) = 120 degrees.. |
| 125. |
T WAKASA, H SAKAI, H OKAMURA, H OTSU, S ISHIDA, N SAKAMOTO, T UESAKA, Y SATOU, MB GREENFIELD, N KOORI, A OKIHANA, K HATANAKA, SPIN-FLIP STRENGTH IN THE CONTINUUM AND EFFECTIVE TENSOR INTERACTIONS VIA POLARIZATION TRANSFER D-NN(0-DEGREES) FOR ((P)OVER-RIGHT-ARROW,(N)OVER-RIGHT-ARROW) REACTIONS AT 295-MEV, PHYSICAL REVIEW C, Vol.51, No.6, pp.R2871-R2875, 1995.06. |
| 126. |
H OKAMURA, S FUJITA, Y HARA, K HATANAKA, T ICHIHARA, S ISHIDA, K KATOH, T NIIZEKI, H OHNUMA, H OTSU, H SAKAI, N SAKAMOTO, Y SATOU, T UESAKA, T WAKASA, T YAMASHITA, TENSOR ANALYZING POWER OF THE (D,HE-2)-REACTION AT 270-MEV, PHYSICS LETTERS B, 10.1016/0370-2693(94)01607-E, Vol.345, No.1, pp.1-5, 1995.02, The tenser analyzing power of the (d,He-2) reaction has been measured at 270 MeV, Its usefulness for spectroscopic studies, particularly in identifying the J(pi) of spin-flip dipole states, is demonstrated for a C-12 target. The data are reasonably well reproduced in terms of the distorted-wave Born approximation theory for the three-body reaction.. |
