包括的ニュートリノ原子核反応の記述

• Project Area: Gravitational wave physics and astronomy: Genesis
• Project/Area Number: 18H04569
• Research Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
• Allocation Type: Single-year Grants
• Research Institution: Hokkaido University
• Principal Investigator: 堀内 渉 北海道大学, 理学研究院, 講師 (00612186)
• Project Period (FY): 2018-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000); Fiscal Year 2019: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
• Keywords: 宇宙核反応 / ベータ崩壊 / ニュートリノ反応 / 密度汎関数法 / 核行列要素 / ニュートリノ原子核反応 / 原子核第一原理計算 / 原子核密度汎関数法 / 原子核応答 / 原子核行列要素 / 原子核密度汎関数理論

Outline of Annual Research Achievements

最近の超新星爆発シミュレーションの発展により、ニュートリノ原子核反応は重力崩壊型超新星爆発過程において重要な役割をなすことが明らかになってきた。基本的なインプットであるニュートリノ原子核反応率の信頼のおける評価が望まれているが、反応率は非常に小さいため実験的評価は特定の原子核やエネルギーに限られてしまい、超新星爆発過程に寄与する全ての反応を評価するには理論計算に頼らざるを得ない。本研究計画は包括的ニュートリノ反応を効率よく記述する新たな定式を確立し、軽い原子核から重い原子核を含む広いエネルギー領域での反応率を評価するものである。陽子・中性子の自由度から出発した一貫した精密原子核理論により未知のニュートリノ原子核反応率を決定し、超新星爆発機構の解明を目指す。
本年度は原子核のレプトン崩壊過程に現れるクーロン波動関数の取り扱いを改善し、許容遷移、禁止遷移を含めたベータ崩壊率の再定式化を行った。より現実的な例も含め、広い質量・エネルギー領域で検証を行い、重い原子核においては従来の方法に比べ反応率が大きく修正されることを指摘した。利用者の便宜のため波動関数を生成するプログラムを公開し、現在学術論文として投稿中である(arXiv: 2103.16815)。同時に様々なプローブによる原子核散乱を記述する枠組みの開発及び応用、密度汎関数理論による現実的な弱相互作用過程の記述、ニュートリノ核子におけるパイ中間子生成過程等の成果が発表された。

Research Progress Status

令和元年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和元年度が最終年度であるため、記入しない。

Research Products

• [Int'l Joint Research] インド工科大学ルールキー校(インド)
• [Journal Article] Total reaction cross section on a deuteron target and the eclipse effect of the constituent neutron and proton (2020)
  • Author(s): Horiuchi W.、Suzuki Y.、Uesaka T.、Miwa M.
  • Journal Title: Physical Review C Volume: 102 Issue: 5 Pages: 1-8
  • DOI: 10.1103/physrevc.102.054601
  • Peer Reviewed
• [Journal Article] Imprint of a nuclear bubble in nucleon-nucleus diffraction (2020)
  • Author(s): Choudhary V.、Horiuchi W.、Kimura M.、Chatterjee R.
  • Journal Title: Physical Review C Volume: 102 Issue: 3 Pages: 1-8
  • DOI: 10.1103/physrevc.102.034619
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Utility of antiproton-nucleus scattering for probing nuclear surface density distributions (2020)
  • Author(s): Makiguchi K.、Horiuchi W.、Kohama A.
  • Journal Title: Physical Review C Volume: 102 Issue: 3 Pages: 1-8
  • DOI: 10.1103/physrevc.102.034614
  • Peer Reviewed
• [Journal Article] Charge-exchange dipole excitations in deformed nuclei (2020)
  • Author(s): Yoshida Kenichi
  • Journal Title: Physical Review C Volume: 102 Issue: 5 Pages: 054336-054336
  • DOI: 10.1103/physrevc.102.054336
  • NAID: 120006942813
  • Peer Reviewed
• [Journal Article] Impact of final state interactions on neutrino-nucleon pion production cross sections extracted from neutrino-deuteron reaction data (2019)
  • Author(s): Nakamura S.X.、Kamano H.、Sato T.
  • Journal Title: Physical Review D Volume: 99 Issue: 3 Pages: 0313011-6
  • DOI: 10.1103/physrevd.99.031301
  • Peer Reviewed / Open Access
• [Journal Article] Suddenly shortened half-lives beyond 78Ni : N = 50 magic number and high-energy nonunique first-forbidden transitions (2019)
  • Author(s): Kenichi Yoshida
  • Journal Title: Phys. Rev. C Volume: 100 Issue: 2 Pages: 1-9
  • DOI: 10.1103/physrevc.100.024316
  • NAID: 130008151966
  • Peer Reviewed
• [Journal Article] Experimental study of Gamow-Teller transitions via the high-energy-resolution O18(He3,t)F18 reaction: Identification of the low-energy “super” -Gamow-Teller state (2019)
  • Author(s): Fujita H.、Fujita Y.、Utsuno Y.、Yoshida K.、Adachi T.、Algora A.、Csatl?s M.、Deaven J. M.、Estevez-Aguado E.、Guess C. J.、Guly?s J.、Hatanaka K.、Hirota K.、Hutton R.、et. al
  • Journal Title: Physical Review C Volume: 100 Issue: 3 Pages: 1-13
  • DOI: 10.1103/physrevc.100.034618
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Complete Glauber calculations for proton-nucleus inelastic cross sections (2019)
  • Author(s): Hatakeyama S.、Horiuchi W.
  • Journal Title: Nuclear Physics A Volume: 985 Pages: 20-37
  • DOI: 10.1016/j.nuclphysa.2019.02.004
  • Peer Reviewed
• [Journal Article] Microscopic global optical potential for nucleon-nucleus systems in the energy range 50?400 MeV (2019)
  • Author(s): Furumoto T.、Tsubakihara K.、Ebata S.、Horiuchi W.
  • Journal Title: Physical Review C Volume: 99 Issue: 3 Pages: 1-22
  • DOI: 10.1103/physrevc.99.034605
  • NAID: 120006651804
  • Peer Reviewed
• [Journal Article] Nuclear surface diffuseness revealed in nucleon-nucleus diffraction (2018)
  • Author(s): Hatakeyama S.、Horiuchi W.、Kohama A.
  • Journal Title: Physical Review C Volume: 97 Issue: 5 Pages: 1-11
  • DOI: 10.1103/physrevc.97.054607
  • NAID: 120006501194
  • Peer Reviewed
• [Journal Article] Examination of the C22 radius determination with interaction cross sections (2018)
  • Author(s): Nagahisa T.、Horiuchi W.
  • Journal Title: Physical Review C Volume: 97 Issue: 5 Pages: 1-10
  • DOI: 10.1103/physrevc.97.054614
  • NAID: 120006517687
  • Peer Reviewed
• [Journal Article] Analyzing supersymmetric transformed α-nucleus potentials with electric-multipole transitions (2018)
  • Author(s): Arai T.、Horiuchi W.、Baye D.
  • Journal Title: Nuclear Physics A Volume: 977 Pages: 82-100
  • DOI: 10.1016/j.nuclphysa.2018.06.004
  • Peer Reviewed / Int'l Joint Research
• [Presentation] Re-formulation of nuclear beta decay (2021)
  • Author(s): T. Sato
  • Organizer: KEK workshop "Beta decay, r process, and related weak-interaction processes"
  • Int'l Joint Research / Invited
• [Presentation] Towards a unified description of neutrino-nucleus reactions for a wide range of momentum and energy transfers, and mass number (2020)
  • Author(s): W. Horiuchi, K. Yoshida, and T. Sato
  • Organizer: Innovative Area (FY2017-2021) Gravitational Wave Physics and Astronomy: Genesis, The Third Annual Area Symposium
  • Int'l Joint Research
• [Presentation] 原子核ベータ崩壊の再定式化：High-Z 核に対する有効な手法 (2020)
  • Author(s): 堀内渉, 佐藤透, 上坂優一, 吉田賢市
  • Organizer: 日本物理学会第76回年次大会
• [Presentation] 原子核半径決定における重陽子標的の有用性 (2020)
  • Author(s): 堀内渉, 鈴木宜之, 上坂友洋, 三輪海彩
  • Organizer: 日本物理学会第76回年次大会
• [Presentation] 密度依存α-N有効相互作用を用いた弾性散乱の記述 (2020)
  • Author(s): 椿原康介, 江幡修一郎, 堀内渉, 古本猛憲
  • Organizer: 日本物理学会2020 年秋季大会
• [Presentation] 原子核密度分布に対する反陽子-原子核散乱の有用性 (2020)
  • Author(s): 槇口雄二，堀内渉，小濱洋央
  • Organizer: 日本物理学会2020年秋季大会
• [Presentation] 第一原理計算によるヘリウム原子核の電弱応答 (2019)
  • Author(s): 堀内渉
  • Organizer: 核データと元素合成を中心とする宇宙核物理研究会、北海道大学
  • Invited
• [Presentation] 6体計算による6Li の電気双極子励起機構の研究II (2019)
  • Author(s): 佐塚修司、堀内渉
  • Organizer: 日本物理学会第74回年次大会
• [Presentation] 包括的ニュートリノ原子核反応の記述に向けて (2019)
  • Author(s): 堀内渉
  • Organizer: 研究会「ニュートリノ原子核反応とニュートリノ相互作用」
  • Invited
• [Presentation] Description of inclusive neutrino-nucleus reactions without explicit angular momentum decomposition (2018)
  • Author(s): W. Horiuchi, K. Yoshida, T. Sato
  • Organizer: 2nd Annual Symposium of Gravitational-Wave Genesis
  • Int'l Joint Research
• [Presentation] Nuclear radii and density determination using a proton target (2018)
  • Author(s): W. Horiuchi
  • Organizer: Workshop on "HIAF High-Energy Beam Line Physics and Nuclear Astrophysics"
  • Int'l Joint Research / Invited
• [Presentation] Role of alpha-cluster structure in electric-dipole excitations of 6Li (2018)
  • Author(s): S. Satsuka, W. Horiuchi
  • Organizer: Fifth Joint Meeting of the Nuclear Physics Divisions of the American Physical Society and the Physical Society of Japan
  • Int'l Joint Research
• [Presentation] Short-range correlations and momentum distributions in light nuclei (2018)
  • Author(s): W. Horiuchi
  • Organizer: Mini-Symposium on "Two- and three-body correlations in nuclei" at Fifth Joint Meeting of the Nuclear Physics Divisions of the American Physical Society and the Physical Society of Japan
  • Int'l Joint Research
• [Presentation] Proton-nucleus scattering as a probe of the nuclear structure (2018)
  • Author(s): W. Horiuchi
  • Organizer: International Conference on Physics Mandalay, 2018
  • Int'l Joint Research / Invited
• [Presentation] Glauber model analysis for the 22C nuclear radius (2018)
  • Author(s): T. Nagahisa, W. Horiuchi
  • Organizer: The 22nd International Conference on Few-Body Problems in Physics (FB22)
  • Int'l Joint Research
• [Presentation] Complete Glauber calculations for high-energy inelastic processes (2018)
  • Author(s): W. Horiuchi, S. Hatakeyama, T. Nagahisa
  • Organizer: The 10th International Symposium on Direct Reactions with Exotic Beams (DREB2018)
  • Int'l Joint Research
• [Remarks] 北海道大学原子核理論研究室
  • URL: http://nucl.sci.hokudai.ac.jp/tnpl/
• [Remarks] 研究会「ニュートリノ原子核反応とニュートリノ相互作用」
  • URL: http://j-parc-th.kek.jp/workshops/2019/02-22/