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若狭 智嗣, 九州大学における素粒子・原子核研究と加速器科学, 第１９回日本加速器学会年会, 2022.10, 九州大学では、理学研究院・工学研究院等の部局と、超重元素研究センター (RCSHE)・先端素粒子物理研究センター（RCAPP）・加速器ビーム応用科学センター（CABAS）のセンターが連携した「先端素粒子・原子核研究拠点」を形成し、素粒子・原子核等の基礎科学の分野において国際的なネットワークを構築すると共に、若手研究者や博士課程学生の育成を推進している。現在、元素の周期表は７周期目まで完成し、九州大学は基幹組織として119番新元素合成実験を理化学研究所で推進している。新元素合成は極めて長期間に渡る研究であるが、119番・120番の新元素を発見することは科学のフロンティアである。他方、素粒子実験においても、CERN/LHCにおいて令和4年2月からRun3実験が開始され、ヒッグス粒子の性質の測定や、標準理論を超える物理の探索などが行われる。また、J-PARC/COMETにおいても令和4年12月には最初のミューオンビームを用いたPhase-α実験が予定されている。加速器センターにおいては、タンデム加速器のビームは教育・研究に供されており、新元素・新同位体・不安定核研究に用いる検出器開発等が行われている。また、FFAG加速器からの100 MeV級陽子ビームを実験に供する為の「FFAGビーム照射システム」や、京都大学から移設した「ERIT中性子発生装置」の整備が進みつつある。
本講演では、このような九州大学における原子核・素粒子物理学や加速器科学の研究について最近の成果や将来計画・展望を紹介する。. |
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WAKASA TOMOTSUGU, Nuclear Spin-Isospin Responses Studied by Nuclear Reactions; A tribute to Munetake Ichimura, 24th International Spin Symposium (SPIN2021), 2021.10, Progress in the nuclear spin physics studied by nuclear reactions is briefly reviewed with particular emphasis on the contributions of Munetake Ichimura and his research-group. Much of his recent work was based on a comprehensive framework consisting of a distorted wave impulse approximation (DWIA) with response function calculated by a continuum random phase approximation (RPA). We pay special attention to two contrasting problem. One is the quenching of the total Gamow-Teller (GT) transition strength with respect to the model-independent GT sum rule (Ikeda's sum rule).The other is the enhancement of the pionic modes at relative large momentum transfers as a precursor phenomenon of pion condensation.A main aim of this review is to gain an overall understanding of the behavior of these spin-isospin modes. Furthermore, recent developments in the isospin dependence of the spin-isospin residual interaction studied by the GT resonances for unstable nuclei as well as the tensor correlation effects observed in the spin-dipole resonances are also addressed.. |
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WAKASA TOMOTSUGU, RCNPにおける(p,N)および(p,2N)反応におけるスピン観測量のデータについて, 時間階層進化として捉える原子核反応, 2020.10. |
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WAKASA TOMOTSUGU, Study of in-medium NN interactions by using (p,pN) reactions, 第5解クラスター階層領域研究会, 2020.09. |
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WAKASA TOMOTSUGU, Studies of two- and three-nucleon interactions in nuclear reactions, 5th Joint Meeting of the Nuclear Physics Divisions of the APS and the JPS, 23-27 Oct. 2018, Hawaii, U.S.A., 2018.10. |
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WAKASA TOMOTSUGU, Nuclear Spin Physics via Polarization Measurements, The 23rd International Spin Physics Symposium (SPIN2018), Ferrara, Italy, September 2018., 2018.09, One of the primary goals of nuclear physics is to describe nuclei and their dynamics in terms of interactions between nuclear constituents.
In addition, high-precision experimental data and sophisticated theoretical calculations are very important for other research fields such astrophysics and neutrino physics.
In this talk, three topics will be discussed by comparing experimental data with recent sophisticated calculations; three-nucleon force (3NF) effects in few nucleon systems and nuclear medium effects of nucleon-nucleon (NN) interactions, polarization phenomena and spin-isospin responses for the quest for a comprehensive description of nuclei, and applications of nuclear physics data and calculations for nuclear equation-of-state (EOS) and neutrino-less double beta-decay nuclear matrix element (NME).. |
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若狭 智嗣, Gamow-Teller and Spin-Dipole Resonances and Experimental Methods for Spin Excitations, The 16th CNS International Summer School (CNSSS17), August 2017, Wako, Japan, 2017.08, Gamow-Teller and Spin-Dipole Resonances and Experimental Methods for Spin Excitations. |
| 8. |
若狭 智嗣, Pionic and Tensor Correlations Studied by High Resolution and Polarization Transfer Measurements, HST15, 2015.11, Pionic and Tensor Correlations Studied by High Resolution and Polarization Transfer Measurements. |
| 9. |
若狭 智嗣, 偏極移行量測定による双極子励起モードの研究, 日本物理学会, 2015.09, 偏極移行量測定による双極子励起モードの研究. |
| 10. |
WAKASA TOMOTSUGU, Decomposing Spin-Dipole Resonances by Complete Polarization Transfer Measurements, International Conference on Recent Trends in Nuclear Physics" (ICRTNP-2012), 2012.11. |
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WAKASA TOMOTSUGU, Spin-Parity Decomposition of Spin Dipole Resonances and Tensor Interaction Effects, The 4th international conference on Collective Motion in Nuclei under Extreme Conditions (COMEX4), 2012.10. |
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若狭 智嗣, 精密核物理の将来, 日本物理学会, 2011.09. |
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若狭 智嗣, エネルギーアップグレードによる物理, 大阪大学核物理研究センター研究計画検討専門委員会, 2012.03. |
| 14. |
若狭 智嗣, エネルギーアップグレードによる物理, 大阪大学核物理研究センター研究計画検討専門委員会, 2012.03. |
| 15. |
T. Wakasa, Gamow-Teller and Spin-Dipole Transitions Studied by (p,n) Polarization Measurements, New Facet of Spin-Isospin Responses (SIR2010), 2010.02. |
| 16. |
T. Wakasa, Pionic and Tensor Correlations on Spin and Isospin Responses, Reactions and Nucleon Properties in Rare Isotopes, 2010.04. |
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T. Wakasa, Nuclear Spin Physics via Polarization Measurements, SPIN2008 International Spin Physics Symposium, 2008.10. |
| 18. |
若狭 智嗣, アイソベクトル型反応で見る原子核中のパイオンの役割, 日本物理学会, 2008.03. |
| 19. |
若狭 智嗣, 伊原 エマ, Complete set of polarization transfer coefficientsw for the 3He(p,n) reaction at 346 MeV and 0 degrees, 原子核研究における少数系物理, 2008.03. |
| 20. |
若狭 智嗣, 酒見 泰寛, コヒーレント中間子生成とデルタ領域のスピン・アイソスピン物理, 核子と中間子の多体問題の統一的描像に向けて, 2007.12. |
| 21. |
T. Wakasa, Search for Alpha Cluster Condensed State in 16O via 16O(alpha,alpha') Scattering, NS07 International Workshop in Nuclear Structure -New Pictures in the Extended Isospin Space-, 2007.06. |
| 22. |
T. Wakasa, Isovector Effective NN Interaction in 28Si(p,n)28P(6-) at 198 MeV, INPC2007 International Nuclear Physics Conference 2007, 2007.06. |
| 23. |
T. Wakasa, Pionic correlations studied via (p,n) and (p,p') reactions, ECT* workshop on short and long-range contributions to nuclear saturation and binding, 2003.06. |
| 24. |
T. Wakasa, G.P.A. 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, and M. Yosoi, New capabilities of the Grand raiden spectrometer, 16th international conference on particles and nuclei, 2002.10. |
| 25. |
T. Wakasa, H. Sakai, M. Ichimura, K. Hatanaka, M.B. Greenfield, H. Okamura, K. Kawahigashi, A. Tamii, H. Otsu, Y. Nakaokam, T. Ohnishi, K. Yako, K. Sekiguchi, T. Yagita, J. Kamiya, S. Sakoda, K. Suda, H. Kato, M. Hatano, and Y. Maeda, Momentum transfer dependence of spin isospin modes in quasielastic region, 15th international spin physics symposium, 2002.09. |
| 26. |
T. Wakasa, G.P.A. Berg, H. Fujimura, K. Fujita, K. Hatanaka, M. Itoh, J. Kamiya, T. Kawabata, K. Kitamura, E. Obayashi, H. Sakaguchi, N. Sakamoto, Y. Sakemi, Y. Shimizu, H. Takeda, M. Uchida, Y. Yasuda, H.P. Yoshida, and M. Yosoi, High resolution study of pionic 0- state in 16O, Nuclear many-body and medium effects in nuclear interactions and reactions, 2002.10. |
| 27. |
T. Wakasa, G.P.A. Berg, H. Fujimura, K. Fujita, K. Hatanaka, M. Itoh, J. Kamiya, T. Kawabata, K. Kitamura, E. Obayashi, H. Sakaguchi, N. Sakamoto, Y. Sakemi, Y. Shimizu, H. Takeda, M. Uchida, Y. Yasuda, H.P. Yoshida, and M. Yosoi, High resolution study of 0- state in 16O, 15th international spin physics symposium, 2002.09. |
| 28. |
T. Wakasa, K. Hatanaka, H. Sakai, S. Fujita, T. Nonaka, K. Yako, K. Sekiguchi, H. Okamura, T. Uesaka, H. Otsu, S. Ishida, N. Sakamoto, Y. Satou, T. Ohnishi, and M.B. Greenfield, Gamow-Teller strength in the continuum and quenching problem, 7th international topical conference on giant resonances, 2000.06. |
