Progress of microscopic nuclear reaction theory based on the G-matrix effective nuclear interactions

• Project/Area Number: 15K05087
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Particle/Nuclear/Cosmic ray/Astro physics
• Research Institution: Osaka City University
• Principal Investigator: Sakuragi Hiroyuki 大阪市立大学, 総務課, 副学長 (90183821)
• Co-Investigator(Renkei-kenkyūsha): FURUMOTO Takenori 横浜国立大学, 教育学部, 准教授 (20581086) ; YAMAMOTO Yasuo 理化学研究所, 仁科加速器研究センター, 客員研究員 (80124866)
• Research Collaborator: OGATA Kazuyuki ; SATO Koichi ; CHIBA Yohei ; KIKUCHI Yuma ; KANEKO Shotaro
• Project Period (FY): 2015-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000); Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
• Keywords: 微視的核反応理論 / 複素Ｇ行列有効核力 / 三体核力 / チャネル結合法 / 不安定核 / 高密度核媒質 / 中性子星 / 微視的核反応理論の新展開 / 複素G行列 / 重イオン散乱 / 高密度核物質 / 原子核間相互作用 / 遷移密度 / 核物質 / 複素Ｇ行列

Outline of Final Research Achievements

We have established a new microscopic nuclear reaction theory based on the complex G-matrix NN interaction with the effects of three-body and four-body forces, that is natural extension of the microscopic optical model with the same complex G-matrix successful for the description of wide range of elastic scattering of nucleon-nucleus and nucleus-nucleus systems. We have tested it validity in the description of nuclear reactions including inelastic scattering and breakup processed in the coupled-channel/CDCC framework.

Academic Significance and Societal Importance of the Research Achievements

量子多体系である原子核の構造や反応を、原子核の基本構成要素である核子の間に作用する基本相互作用（核力）に基づいて微視的に理解し説明することは、原子核物理学の究極の学術的問いであり、目標である。これまで、原子核反応を核力から出発して曖昧さなく記述することは極めて困難とされてきたが、過去１０年間にわたる先行研究で、弾性散乱と言われるエネルギーや核種の転換を伴わない単純な反応についてのみ、核力から出発して微視的に理解する手法が確立されてきたが、一般の原子核反応過程については未解明であった。今回の研究では、これを弾性散乱いがいの複雑な一般の核反応にも適用できるよう拡張した理論を構築し有効性を検証した。

Research Products

• [Int'l Joint Research] Beihang University, Beijin/Institute of Modern Physics,/Medical College of Soochow(中国)
• [Int'l Joint Research] Beihang University, Beijin/Institute of Modern Physics, Lanzhou/Medical College of Soochow University(中国)
• [Journal Article] Repulsive three-body force and channel-coupling effects via 12C + 12C scattering at 100A MeV (2017)
  • Author(s): W. W. Qu, G. L. Zhang, S. Terashima, T. Furumoto, Y. Ayyad, Z. Q. Chen, C. L. Guo, A. Inoue, X. Y. Le, H. J. Ong, D. Y. Pang, H. Sakaguchi, Y. Sakuragi, B. H. Sun, A. Tamii, I. Tanihata, T. F. Wang, R. Wada, and Y. Yamamoto
  • Journal Title: Physical Review C Volume: 95 Pages: 04416-04416
  • DOI: 10.1103/physrevc.95.044616
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Saturation of Nuclear Matter and Roles of Many-Body Forces: - nuclear matter in neutron stars probed by nucleus-nucleus scattering - (2016)
  • Author(s): Yukinori Sakuragi
  • Journal Title: Progress of Theoretical and Experimental Physics Volume: 06A
  • DOI: 10.1093/ptep/ptw072
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Medium effect in high-density nuclear matter probed by a systematic analysis of nucleus-nucleus elastic scattering (2016)
  • Author(s): T. Furumoto, Y. Sakuragi, and Y. Yamamoto
  • Journal Title: Physical Review C Volume: 94 Pages: 044620-044620
  • DOI: 10.1103/physrevc.94.044620
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Approach to high-density nuclear matter via nucleus-nucleus elastic scattering (2016)
  • Author(s): T. Furumoto, Y. Sakuragi, Y. Yamamoto
  • Journal Title: ACTA PHYSICA POLONICA B Volume: 47 Pages: 853-858
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Saturation of nuclear matter and many-body forces : nuclear matter in neutron star probed by nucleus-nucleus scattering (2016)
  • Author(s): Y. Sakuragi
  • Journal Title: Progress of Theoretical and Experimental Physics Special Section Volume: 未定
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Effects of repulsive three-body force in 12C + 12C scattering at 100A MeV (2015)
  • Author(s): W. W. Qu, G. L. Zhang, S. Terashima, T. Furumoto, Y. Ayyad, Z. Q. Chen, C. L. Guo, A. Inoue, X. Y. Le, H. J. Ong, D. Y. Pang, H. Sakaguchi, Y. Sakuragi, B. H. Sun, A. Tamii, I. Tanihata, T.F. Wang, R. Wada, and Y. Yamamoto
  • Journal Title: Phys. Rev. Letters B Volume: 751 Pages: 1-6
  • DOI: 10.1016/j.physletb.2015.10.008
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Presentation] 24Mgのα非弾性散乱断面積と単極子強度分布の対応 (2019)
  • Author(s): 緒方一介, 千葉陽平, 櫻木弘之
  • Organizer: 日本物理学会第74回年次大会（於九州大学）
• [Presentation] High-density nuclear matter probed by nucleus-nucleus scattering: - its implication to neutron star mass problem - (2015)
  • Author(s): Y. Sakuragi
  • Organizer: EMMI workshop on "Cold dense nuclear matter from short range correlations to neutron stars
  • Place of Presentation: GSI, Germany
  • Year and Date: 2015-10-13
  • Int'l Joint Research
• [Presentation] 核物質の飽和性と多体力：－原子核散乱で解き明かす中性子星の核物質－ (2015)
  • Author(s): 櫻木弘之
  • Organizer: 大阪市立大学特別栄誉教授・南部陽一郎先生 追悼シンポジウム
  • Place of Presentation: 大阪市立大学(大阪府）
  • Year and Date: 2015-09-29
  • Invited
• [Presentation] 高エネルギー6Li散乱における6Li分解効果のエネルギー依存性 (2015)
  • Author(s): 金子祥太朗、櫻木弘之、古本猛憲
  • Organizer: 日本物理学会2015秋季大会
  • Place of Presentation: 大阪市立大学(大阪府)
  • Year and Date: 2015-09-25
• [Presentation] High-density nuclear matter probed by nucleus-nucleus scattering (2015)
  • Author(s): 櫻木弘之、古本猛憲、山本安夫
  • Organizer: 科学研究費補助金・新学術領域研究「実験と観測で解き明かす中性子星の核物質」
  • Place of Presentation: 湘南国際村センター(神奈川県)
  • Year and Date: 2015-09-17
• [Presentation] Approach to high-density nuclear matter via nucleus-nucleus elastic scattering (2015)
  • Author(s): T. Furumoto
  • Organizer: XXXIV Mazurian Lakes Conference on Physics
  • Place of Presentation: Piaski, Poland
  • Year and Date: 2015-09-06
  • Int'l Joint Research / Invited