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Microscopic nuclear reaction theory for low-energy fusion and fission

Research Project

Project/Area Number 19K03861
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 15010:Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics
Research InstitutionKyoto University

Principal Investigator

Hagino Kouichi  京都大学, 理学研究科, 教授 (20335293)

Co-Investigator(Kenkyū-buntansha) 谷村 雄介  東北大学, 理学研究科, 助教 (90804310)
Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords生成座標法 / トンネル効果 / 核融合 / 核分裂 / 時間依存アプローチ / 基底状態相関 / 機械学習 / 集団運動 / 密度汎関数法 / 原子核構造 / 核融合反応 / 量子トンネル現象 / 多体問題 / 微視的反応理論 / クラスター崩壊 / 微視的核反応理論 / 超重元素
Outline of Research at the Start

原子核反応理論における大きな目標は、核子の自由度を用いて微視的に原子核反応を記述し、その量子多体ダイナミックスを理解することである。しかしながら、量子トンネル現象が重要となる低エネルギー領域の原子核反応に対し、そのような微視的核反応理論はこれまで全く存在してこなかった。本研究では、低エネルギー領域に適用可能な微視的反応理論を新たに構築し、量子トンネル現象が本質的な役割を果たす重イオン核融合反応及び核分裂にその理論を適用する。これにより、低エネルギー原子核反応の量子多体ダイナミックスを明らかにし、超重元素生成反応、天体核反応、核分裂、化学反応などに対する大きな展望を開く。

Outline of Final Research Achievements

By considering a time evolution of a system based on the time-dependent generator coordinate method (TDGCM) with multi Slater determinants, we could for the first time describe microscopically quantum tunneling of a many-particle system. Namely, even in a situation where the tunneling probability is zero with a single Slater determinant, we obtained a finite tunneling probability by linearly superposing many Slater determinants. We also applied the same method to the ground state of atomic nuclei. By optimizing both the basis Slater determinants and the coefficients for a linear superposition, we showed that a better description for the ground state can be achieved by including not only the local ground states but also excited state configurations. This is in contrast to the usual assumption of GCM, in which only local ground states are superposed, and has a large impact on theory of large amplitude collective motions of atomic nuclei.

Academic Significance and Societal Importance of the Research Achievements

これまで量子トンネル現象が本質的な役割を果たす低エネルギー領域における核融合反応を微視的に記述する核反応理論はほとんど皆無であったが、本研究により多粒子系の量子トンネル現象を微視的に記述する筋道を見いだせた意義は大きい。また、原子核の基底状態に対する知見は、局所基底状態の重ね合せで系の基底状態を記述できるというこれまで信じられてきた仮定を大きく覆すものであり、原子核の集団運動の理論の発展に大きな影響を及ぼすものである。

Report

(6 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (58 results)

All 2024 2023 2022 2021 2020 2019 Other

All Int'l Joint Research (8 results) Journal Article (27 results) (of which Int'l Joint Research: 13 results,  Peer Reviewed: 27 results,  Open Access: 4 results) Presentation (21 results) (of which Int'l Joint Research: 10 results,  Invited: 8 results) Remarks (1 results) Funded Workshop (1 results)

  • [Int'l Joint Research] ミラノ大学(イタリア)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] ワシントン大学(米国)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] パドバ大学(イタリア)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] セヴィリア大学(スペイン)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] ワシントン大学(米国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] ワシントン大学(米国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] ソンシル大学(韓国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] リオデジャネイロ大学(ブラジル)

    • Related Report
      2020 Research-status Report
  • [Journal Article] Non-empirical shape dynamics of heavy nuclei with multi-task deep learning2024

    • Author(s)
      N. Hizawa and K. Hagino
    • Journal Title

      Phys. Rev. C

      Volume: 109 Issue: 1

    • DOI

      10.1103/physrevc.109.014312

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Extension of the generator coordinate method with basis optimization2023

    • Author(s)
      M. Matsumoto, Y. Tanimura, and K. Hagino
    • Journal Title

      Phys. Rev. C

      Volume: 108 Issue: 5

    • DOI

      10.1103/physrevc.108.l051302

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Analysis of a Skyrme energy density functional with deep learning2023

    • Author(s)
      Hizawa N.、Hagino K.、Yoshida K.
    • Journal Title

      Physical Review C

      Volume: 108 Issue: 3

    • DOI

      10.1103/physrevc.108.034311

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Orbital-free density functional theory: differences and similarities between electronic and nuclear systems2023

    • Author(s)
      G. Colo and K. Hagino
    • Journal Title

      Prog. Theo. Exp. Phys.

      Volume: 2023 Issue: 10

    • DOI

      10.1093/ptep/ptad118

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Generator coordinate method for transition-state dynamics in nuclear fission2022

    • Author(s)
      G.F. Bertsch and K. Hagino
    • Journal Title

      Phys. Rev. C

      Volume: 105 Issue: 3

    • DOI

      10.1103/physrevc.105.034618

    • Related Report
      2022 Research-status Report 2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Applications of the dynamical generator coordinate method to quadrupole excitations2022

    • Author(s)
      Hizawa N.、Hagino K.、Yoshida K.
    • Journal Title

      Physical Review C

      Volume: 105 Issue: 6

    • DOI

      10.1103/physrevc.105.064302

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Spatial correlation of a particle-hole pair with a repulsive isovector interaction2022

    • Author(s)
      K. Hagino and H. Sagawa
    • Journal Title

      Phys. Rev. C

      Volume: 106 Issue: 3

    • DOI

      10.1103/physrevc.106.034313

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Coupled-channels calculations for nuclear reactions: from exotic nuclei to superheavy elements'2022

    • Author(s)
      K. Hagino, K. Ogata, and A.M. Moro
    • Journal Title

      Prog. in Part. and Nucl. Phys.

      Volume: 125 Pages: 103951-103951

    • DOI

      10.1016/j.ppnp.2022.103951

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Fusion of 12C + 24Mg at extreme sub-barrier energies2022

    • Author(s)
      G. Montagnoli, A.M. Stefanini, C.L. Jiang, K. Hagino, F. Niola, D. Brugnara, P. Colovic, G. Colucci, L. Corradi, R. Depalo, E. Fioretto, A. Goasduff, G. Pasqualato, F. Scarlassara, S. Szilner and I. Zanon
    • Journal Title

      J. Phys. G

      Volume: 49 Issue: 9 Pages: 095101-095101

    • DOI

      10.1088/1361-6471/ac7edd

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Diabatic Hamiltonian matrix elements made simple2022

    • Author(s)
      K. Hagino and G.F. Bertsch
    • Journal Title

      Phys. Rev. C

      Volume: 105 Issue: 3

    • DOI

      10.1103/physrevc.105.034323

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Microscopic description of cluster decays based on the generator coordinate method2022

    • Author(s)
      Uzawa K.、Hagino K.、Yoshida K.
    • Journal Title

      Physical Review C

      Volume: 105 Issue: 3

    • DOI

      10.1103/physrevc.105.034326

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Role of triaxiality in deformed halo nuclei2021

    • Author(s)
      Uzawa K.、Hagino K.、Yoshida K.
    • Journal Title

      Physical Review C

      Volume: 104 Issue: 1

    • DOI

      10.1103/physrevc.104.l011303

    • NAID

      120007193003

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] On deformability of atoms---comparative study between atoms and atomic nuclei2021

    • Author(s)
      Tomoya Naito, Shimpei Endo, Kouichi Hagino, and Yusuke Tanimura.
    • Journal Title

      Journal of Physics B: Atomic, Molecular and Optical Physics

      Volume: 54 Issue: 16 Pages: 165201-165201

    • DOI

      10.1088/1361-6455/ac170c

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Transition-state dynamics in complex quantum systems2021

    • Author(s)
      G.F. Bertsch and K. Hagino
    • Journal Title

      J. Phys. Soc. Jpn.

      Volume: 90 Issue: 11

    • DOI

      10.7566/jpsj.90.114005

    • NAID

      210000159396

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Porter-Thomas fluctuations in complex quantum systems2021

    • Author(s)
      K. Hagino and G.F. Bertsch
    • Journal Title

      Phys. Rev. E

      Volume: 104 Issue: 5

    • DOI

      10.1103/physreve.104.l052104

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Generator coordinate method with a conjugate momentum: Application to particle number projection2021

    • Author(s)
      Hizawa N.、Hagino K.、Yoshida K.
    • Journal Title

      Physical Review C

      Volume: 103 Issue: 3 Pages: 034313-034313

    • DOI

      10.1103/physrevc.103.034313

    • NAID

      120007193005

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Fusion reaction of a weakly-bound nucleus with a deformed target2021

    • Author(s)
      Ki-Seok Choi, K. S. Kim, Myung-Ki Cheoun, W. Y. So, and K. Hagino
    • Journal Title

      Phys. Rev. C

      Volume: 103 Issue: 3

    • DOI

      10.1103/physrevc.103.034611

    • NAID

      120007193004

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Semi-classical approaches to heavy-ion reactions: fusion, rainbow and glory2021

    • Author(s)
      L.F. Canto, K. Hagino, and M. Ueda
    • Journal Title

      Euro. Phys. J. A

      Volume: 57 Issue: 1

    • DOI

      10.1140/epja/s10050-020-00312-8

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Time-Dependent Generator Coordinate Method for Many-Particle Tunneling2020

    • Author(s)
      N. Hasegawa, K. Hagino, and Y. Tanimura
    • Journal Title

      Phys. Lett. B

      Volume: 808 Pages: 135693-135693

    • DOI

      10.1016/j.physletb.2020.135693

    • NAID

      120006878514

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] A microscopic model for spontaneous fission: validity of the adiabatic approximation2020

    • Author(s)
      K. Hagino and G.F. Bertsch
    • Journal Title

      Phys. Rev. C

      Volume: 101 Issue: 6

    • DOI

      10.1103/physrevc.101.064317

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Least action and the maximum-coupling approximations in the theory of spontaneous fission2020

    • Author(s)
      K. Hagino, and G.F. Bertsch
    • Journal Title

      Phys. Rev. C

      Volume: 102 Issue: 2

    • DOI

      10.1103/physrevc.102.024316

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] A nuclear periodic table2020

    • Author(s)
      K. Hagino and Y. Maeno
    • Journal Title

      Foundations of Chemistry

      Volume: 22 Issue: 2 Pages: 267-273

    • DOI

      10.1007/s10698-020-09365-5

    • NAID

      120006841657

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Three related topics on the periodic tables of elements2020

    • Author(s)
      Y. Maeno, K. Hagino, and T. Ishiguro
    • Journal Title

      Foundations of Chemistry

      Volume: 早期出版 Issue: 2 Pages: 1-14

    • DOI

      10.1007/s10698-020-09387-z

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Future of Nuclear Fission Theory2020

    • Author(s)
      M. Bender, K. Hagino 他31名
    • Journal Title

      J. of Phys. G

      Volume: 47 Issue: 11 Pages: 113002-113002

    • DOI

      10.1088/1361-6471/abab4f

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] A new approach for open quantum systems based on a phonon number representation of a harmonic oscillator bath2020

    • Author(s)
      M. Tokieda and K. Hagino
    • Journal Title

      Ann. of Phys.

      Volume: 412 Pages: 1-29

    • DOI

      10.1016/j.aop.2019.168005

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Time-dependent approaches to open quantum systems2020

    • Author(s)
      M. Tokieda and K. Hagino
    • Journal Title

      Front. in Phys.

      Volume: 8 Pages: 1-8

    • DOI

      10.3389/fphy.2020.00008

    • NAID

      120006863521

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Subbarrier fusion reactions of an aligned deformed nucleus2019

    • Author(s)
      K. Hagino and S. Sakaguchi
    • Journal Title

      Phys. Rev. C

      Volume: 100 Issue: 6 Pages: 064614-064614

    • DOI

      10.1103/physrevc.100.064614

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] Orbital-free DFT in nuclear physics2024

    • Author(s)
      K. Hagino
    • Organizer
      Second Workshop on Funamentals in Density Functional Theory (DFT2024)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A short comment on GCM + Orbital-free DFT2023

    • Author(s)
      K. Hagino
    • Organizer
      The 6thworkshop on many-body correlations in microscopic nuclear models
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The genetator coordinate method with optimum basis2023

    • Author(s)
      M. Matsumoto
    • Organizer
      The 2023 Fall Meeting of the Division of Nuclear Physics of the American Physical Society and the Physical Society of Japan (HAWAII23)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Non-empirical description of nuclear collective motion with optimized basis for multi-reference density functional theory2023

    • Author(s)
      Moemi Matsumoto, Yusuke Tanimura, and Kouichi Hagino
    • Organizer
      International Conference on Heavy-Ion Collisions at near-barrier energies (FUSION23)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Dineutron correlations in neutron-rich nuclei2022

    • Author(s)
      K. Hagino
    • Organizer
      Physics of RI: Recent progress and perspectives
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 対相関と対移行反応2022

    • Author(s)
      萩野浩一
    • Organizer
      RCNP 研究会「微視的系と巨視的系における核子対凝縮相」
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 原子核形状の理論研究と核分裂2022

    • Author(s)
      萩野浩一
    • Organizer
      理研ワークショップ「反応断面積研究の新しい展望」
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 核子自由度に基づく誘起核分裂の微視的記述に向けて2022

    • Author(s)
      萩野浩一
    • Organizer
      理研RIBFミニワークショップ「理論 と実験で拓く中性子過剰核の核分裂」
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 核分裂の微視的記述に向けて2021

    • Author(s)
      萩野浩一
    • Organizer
      研究会「核分裂を始めとする重たい核の物理」
    • Related Report
      2021 Research-status Report
  • [Presentation] 殻模型的手法によるクラスター崩壊現象の新展開2021

    • Author(s)
      萩野浩一
    • Organizer
      新学術領域「量子クラスターで読み解く物資の階層構造」
    • Related Report
      2021 Research-status Report
  • [Presentation] Transition-state dynamics in complex quantum systems2021

    • Author(s)
      萩野浩一
    • Organizer
      Workshop on Modern Developments in Quantum Chaos
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] ダイフェルミオン相関:2電子系からダイニュートロンまで2021

    • Author(s)
      萩野浩一
    • Organizer
      第10回「物質階層を横断する会」
    • Related Report
      2021 Research-status Report
  • [Presentation] 原子核で周期表を作ってみたら:エレメンタッチからニュークリタッチへ2021

    • Author(s)
      萩野浩一
    • Organizer
      核データ研究会2021
    • Related Report
      2021 Research-status Report
  • [Presentation] 原子核反応の量子多体ダイナミックス2021

    • Author(s)
      萩野浩一
    • Organizer
      KEK素核宇・物性連携研究会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] 時間依存生成座標法を用いた 多体系の障壁透過問題2021

    • Author(s)
      長谷川直人
    • Organizer
      日本物理学会第75回年次大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 複合核反応の微視的理解に向けて2020

    • Author(s)
      萩野浩一
    • Organizer
      オンライン研究会「時間階層進化として捉える原子核反応」
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] Recent progress and future perspectives of fusion and fission dynamics: from nuclear astrophysics to superheavy nuclei2020

    • Author(s)
      萩野浩一
    • Organizer
      A3 Foresight Program Joint Annual Meeting
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Role of quantum mechanics in a diffusion process for superheavy elements2020

    • Author(s)
      萩野浩一
    • Organizer
      The Virtual Superheavy Elements seminars
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 時間依存生成座標法を用いた核融合反応におけるトンネル効果2019

    • Author(s)
      長谷川直人
    • Organizer
      日本物理学会2019 年秋季大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Microscopic description of quantum tunneling in nuclear reactions with a time-dependent generator coordinate method2019

    • Author(s)
      長谷川直人
    • Organizer
      YITP Molecule-type workshop on Nuclear Fission Dynamics
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Towards a microscopic dynamical description of s fission process with TDGCM2019

    • Author(s)
      谷村雄介
    • Organizer
      YITP Molecule-type workshop on Nuclear Fission Dynamics
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Remarks] 新しい周期表を考案 -原子核の周期表「ニュークリタッチ」-

    • URL

      https://www.kyoto-u.ac.jp/ja/research-news/2020-05-01-0

    • Related Report
      2020 Research-status Report
  • [Funded Workshop] International Conference on Heavy-Ion Collisions at near-barrier energies (FUSION23)2023

    • Related Report
      2023 Annual Research Report

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Published: 2019-04-18   Modified: 2025-01-30  

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