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Satoshi Sakaguchi Last modified date:2024.04.09

Professor / Fundamental Particle Physics
Department of Physics
Faculty of Sciences

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Webpage of experimental nuclear physics group .
Academic Degree
Field of Specialization
Experimental Nuclear Physics
Outline Activities
1. Search for new superheavy element, study of reaction mechanism for production of SHE, study of physics properties of SHE.
2. Investigation of reaction involving unstable nuclei and development of new methods for studying properties of unstable nuclei
Research Interests
  • Search for new superheavy element
    keyword : Superheavy element
  • Nucelar spectroscopy of unstable nuclei via polarized-proton resonant scattering
    keyword : Unstable nuclei, proton retonant scattering
  • Development of method to measure neutron-skin thickness by "isospin-generalized proton elastic scattering"
    keyword : Unstable nucleus, neutron skin
  • Spin-orbit interaction between proton and unstable nucleus
    keyword : Unstable nucleus, spin polarization
Academic Activities
1. M. Tanaka, P. Brionnet, M. Du, J. Ezold, K. Felker, B. J. P. Gall, S. Go, R. K. Grzywacz, H. Haba, K. Hagino, S. Hogle, S. Ishizawa, D. Kaji, S. Kimura, T. T. King, Y. Komori, R. K. Lemon, M. G. Leonard, K. Morimoto, K. Morita, D. Nagae, N. Naito, T. Niwase, B. C. Rasco, J. B. Roberto, K. P. Rykaczewski, S. Sakaguchi, H. Sakai, Y. Shigekawa, D. W. Stracener, S. VanCleve, Y. Wang, K. Washiyama, and T. Yokokita, Probing Optimal Reaction Energy for Synthesis of Element 119 from 51V+248Cm Reaction with Quasielastic Barrier Distribution Measurement, Journal of the Physical Society of Japan,, 91, 084201, 2022.07.
2. K. Hagino and S. Sakaguchi, Subbarrier fusion reactions of an aligned deformed nucleus, Physical Review C, 10.1103/PhysRevC.100.064614, 100, 2019.12, We discuss heavy-ion fusion reactions of a well-deformed odd-mass nucleus at energies around the Coulomb barrier. To this end, we consider the 16O+165Ho reaction and take into account the effect of deformation of 165Ho using the orientation average formula. We show that fusion cross sections are sensitive to magnetic substates of the target nucleus, and cross sections for the side collision, which are relevant to a synthesis of superheavy elements, may be enhanced by a factor of around two by aligning the deformed target nuclei. We also discuss the effect of alignment on the fusion barrier distribution. We find that, for a particular choice of alignment, the shape of barrier distribution becomes similar to a typical shape of barrier distribution for a deformed nucleus with a negative hexadecapole deformation parameter, β4, even if the intrinsic β4 is positive in the target nucleus..
3. S. Chebotaryov, S. Sakaguchi, T. Uesaka, T. Akieda, Y. Ando, M. Assie, D. Beaumel, N. Chiga, M. Dozono, A. Galindo-Uribarri, B. Heffron, A. Hirayama, T. Isobe, K. Kaki, S. Kawase, W. Kim, T. Kobayashi, H. Kon, Y. Kondo, Y. Kubota, S. Leblond, H. Lee, T. Lokotko, Y. Maeda, Y. Matsuda, K. Miki, E. Milman, T. Motobayashi, T. Mukai, S. Nakai, T. Nakamura, A. Ni, T. Noro, S. Ota, H. Otsu, T. Ozaki, V. Panin, S. Park, A. Saito, H. Sakai, M. Sasano, H. Sato, K. Sekiguchi, Y. Shimizu, I. Stefan, L. Stuhl, M. Takaki, K. Taniue, K. Tateishi, S. Terashima, Y. Togano, T. Tomai, Y. Wada, T. Wakasa, T. Wakui, A. Watanabe, H. Yamada, Zh Yang, M. Yasuda, J. Yasuda, K. Yoneda, J. Zenihiro, Proton elastic scattering at 200 A MeV and high momentum transfers of 1.7-2.7 fm -1 as a probe of the nuclear matter density of 6 He, Progress of Theoretical and Experimental Physics, 10.1093/ptep/pty048, 2018, 5, 2018.05, Differential cross sections of p-6He elastic scattering were measured in inverse kinematics at an incident energy of 200 A MeV, covering the high momentum transfer region of 1.7-2.7 -1. The sensitivity of the elastic scattering at low and high momentum transfers to the density distribution was investigated quantitatively using relativistic impulse approximation calculations. In the high momentum transfer region, where the present data were taken, the differential cross section has an order of magnitude higher sensitivity to the inner part of the 6He density relative to the peripheral part (15:1). This feature makes the obtained data valuable for the deduction of the inner part of the 6He density. The data were compared to a set of calculations assuming different proton and neutron density profiles of 6He. The data are well reproduced by the calculation assuming almost the same profiles of proton and neutron densities around the center of 6He, and a proton profile reproducing the known point-proton radius of 1.94 fm. This finding is consistent with the assumption that the 6He nucleus consists of a rigid α-like core with a two-neutron halo..
4. S. Sakaguchi, T. Uesaka, N. Aoi, Y. Ichikawa, K. Itoh, M. Itoh, T. Kawabata, T. Kawahara, Y. Kondo, H. Kuboki, T. Nakamura, T. Nakao, Y. Nakayama, H. Sakai, Y. Sasamoto, K. Sekiguchi, T. Shimamura, Y. Shimizu, and T. Wakui, Shallow and diffuse spin-orbit potential for proton elastic scattering from neutron-rich helium isotopes at 71 MeV/nucleon, Physical Review C, 10.1103/PhysRevC.87.021601, 87, 021601-1-021601-5, 2013.02.
5. S. Sakaguchi, Y. Iseri, T. Uesaka, M. Tanifuji, K. Amos, N. Aoi, Y. Hashimoto, E. Hiyama, M. Ichikawa, Y. Ichikawa, S. Ishikawa, K. Itoh, M. Itoh, H. Iwasaki, S. Karataglidis, T. Kawabata, T. Kawahara, H. Kuboki, Y. Maeda, R. Matsuo, T. Nakao, H. Okamura, H. Sakai, Y. Sasamoto, M. Sasano, Y. Satou, K. Sekiguchi, M. Shinohara, K. Suda, D. Suzuki, Y. Takahashi, A. Tamii, T. Wakui, K. Yako, M. Yamaguchi, and Y. Yamamoto , Analyzing power in elastic scattering of 6He from a polarized proton target at 71 MeV/nucleon, Physics Review C, 10.1103/PhysRevC.84.024604, 84, 024604, 2011.08.
6. T. Uesaka, S. Sakaguchi, Y. Iseri, K. Amos, N. Aoi, Y. Hashimoto, E. Hiyama, M. Ichikawa, Y. Ichikawa, S. Ishikawa, K. Itoh, M. Itoh, H. Iwasaki, S. Karataglidis, T. Kawabata, T. Kawahara, H. Kuboki, Y. Maeda, R. Matsuo, T. Nakao, H. Okamura, H. Sakai, Y. Sasamoto, M. Sasano, Y. Satou, K. Sekiguchi, M. Shinohara, K. Suda, D. Suzuki, Y. Takahashi, M. Tanifuji, A. Tamii, T. Wakui, K. Yako, Y. Yamamoto, and M. Yamaguchi, Analyzing power for proton elastic scattering from the neutron-rich 6He nucleus, Physical Review C, 10.1103/PhysRevC.82.021602, 82, 021602(R), 2010.08.
7. Tomomi Kawahara, Satoshi Sakaguchi, Kenichiro Tateishi, Tsz Leung Tang, and Tomohiro Uesaka, Kinetic Parameters of Photo-Excited Triplet State of Pentacene Determined by Dynamic Nuclear Polarization, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 10.7566/JPSJ.84.044005, 84, 4, 044005-1-044005-7, 2015.03.
1. Satoshi Sakaguchi, Isospin-generalized proton elastic scattering as a probe for iso vector density distribution, 9th International Symposium on Nuclear Symmetry Energy (NuSYM2019), 2019.10.
2. Satoshi Sakaguchi, Superheavy element research at RIKEN and Kyushu University, China Japan Joint Nuclear Physics Symposium, 2018.11.
3. Satoshi Sakaguchi, Proton elastic scattering from 6He at 200 A MeV measured with polarized proton target for RI-beam experiments, The IX International Symposium on EXOtic Nuclei (EXON-2018), 2018.09.
4. Satoshi Sakaguchi, Elastic scattering of polarized protons from 6He at 200 A MeV , 13th International Conference on Nucleus-Nucleus Collisions (NN2018), 2018.12.
5. Satoshi Sakaguchi, Study of Fusion Reaction Mechanism for New Elements and New Isotopes, 20th Northeastern Asian Symposium-2018 on Nuclear Physics in the 21st Century, 2018.09.
6. Satoshi Sakaguchi, Elastic scattering of 6He from polarized proton at 200 A MeV, Direct Reactions with Exotic Beams (DREB2018), 2018.06.
7. S. Sakaguchi, Elastic scattering with a polarized target, Physics with Fragment Separators -25th Anniversary of RIKEN-Projectile Fragment Separator (RIPS25), 2015.12.
8. Satoshi Sakaguchi, Studies of unstable nuclei with spin-polarized proton target, The 21st International Symposium on Spin Physics (Spin2014), 2014.10.
9. Satoshi Sakaguchi, Spin-asymmetry measurement in proton resonant scattering from unstable nuclei, Direct Reactions with Exotic Beams (DREB2014), 2014.07.
10. Satoshi Sakaguchi, Study of Unstable Nuclei with Spin-polarized Protons, Nuclear Physics Seminar at Kyungpook University, 2014.02.
11. Satoshi Sakaguchi, Study of Unstable Nuclei with Spin-polarized Protons, Nuclear Physics Seminar at Instutute for Basic Science, 2014.02.
Membership in Academic Society
  • The Physical Society of Japan
Educational Activities
Undergraduate education: Classical mechanics, Electromagnetism, Thermodynamics, Basic experiment, Physics seminar, Accelerator experiment

Post-graduate education: supervision of master/doctor-course students