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Cluster-Gas States and Low-Density Nuclear Matter

Research Project

Project/Area Number 18K03629
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 InstitutionKanto Gakuin University

Principal Investigator

Yamada Taiichi  関東学院大学, 理工学部, 教授 (70200722)

Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Keywordsクラスターガス状態 / アルファ凝縮状態 / 単極子遷移強度 / 核物質 / 第一原理計算 / 指数関数型相関波動関数 / テンソル最適化フェルミ球法 / 連結クラスター展開定理 / モノポール遷移 / アイソスカラーモノポール遷移強度 / モノポール遷移強度
Outline of Final Research Achievements

In order to disclose the novel properties of the cluster gas state in light nuclei, the research target was expanded from the conventional p-shell region to the sd-shell one. We focused on studying the structure of 20Ne up to the 12C+alpha+alpha threshold region. It was founded that a new state in which two alpha particles move gas-likely around the 12C core nucleus exists in 20Ne.
On the other hand, for the purpose of understanding the nuclear matter related to neutron stars, we developed a theory called as "Tensor-Optimized Fermi Sphere method", which is a new framework for deriving the equation of state of nuclear matter from the first principle. By proving the connected cluster expansion theorem in this theory, and conducting benchmark tests, we confirmed that this theory was valid and paved the path for future full-scale research.

Academic Significance and Societal Importance of the Research Achievements

原子核中のいくつかの核子が互いに強く束縛して複数個のクラスターを形成し、これらが互いにガス的かつ凝縮的に運動するクラスターガス状態の研究は未知なものに対する探究である。本研究では、sd殻の代表例である20Ne核において、12C芯核の周りに2つの4He核がガス的に運動するという原子核の新しい存在様式が出現することを初めて明らかにした。一方、無限系である核物質は謎の多い中性子星の研究と密接な関係があり、原子核物理の基本的課題かつ最先端の研究である。本研究では独創的なアイデアで核力から核物質の状態方程式を導く新しい理論体系を完成させた。この2つの基礎研究は広く量子科学技術の発展に寄与するものである。

Report

(5 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (39 results)

All 2021 2020 2019 2018 Other

All Int'l Joint Research (12 results) Journal Article (15 results) (of which Int'l Joint Research: 9 results,  Peer Reviewed: 15 results,  Open Access: 7 results) Presentation (9 results) (of which Int'l Joint Research: 1 results) Remarks (3 results)

  • [Int'l Joint Research] Universite Paris-Sud, IN2P3-CNRS(フランス)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Universitat Rostok(ドイツ)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Fudan University/Nanjing University/Tongji University(中国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Universite Paris-Sud, IN2P3-CNRS(フランス)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Universitat Rostock(ドイツ)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Nanjing University/Tongji Unuversity/Fudan University(中国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Universite Paris-Sud, IN2P3-CNRS(フランス)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] Universitat Rostock(ドイツ)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] Nanjing University/Tongji Unuversity(中国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] Universite Paris-Sud, IN2P3-CNRS(フランス)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] Universitat Rostock(ドイツ)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] Nanjing University/Tongji University(中国)

    • Related Report
      2018 Research-status Report
  • [Journal Article] Search for alpha condensed states in 13C using alpha inelastic scattering2021

    • Author(s)
      Inaba K、Sasamoto Y、Kawabata T、Fujiwara M、Funaki Y、Hatanaka K、Itoh K、Itoh M、Kawase K、Matsubara H、Maeda Y、Suda K、Sakaguchi S、Shimizu Y、Tamii A、Tameshige Y、Uchida M、Uesaka T、Yamada T、Yoshida H P
    • Journal Title

      Progress of Theoretical and Experimental Physics

      Volume: 2021 Issue: 9 Pages: 1-21

    • DOI

      10.1093/ptep/ptab102

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Properties of 8-11Be isotopes with isospin-dependent spin-orbit potential in a cluster approach2021

    • Author(s)
      Lyu Mengjiao、Ren Zhongzhou、Horiuchi Hisashi、Zhou Bo、Funaki Yasuro、Roepke Gerd、Schuck Peter、Tohsaki Akihiro、Xu Chang、Yamada Taiichi
    • Journal Title

      The European Physical Journal A

      Volume: 57 Issue: 2 Pages: 51-51

    • DOI

      10.1140/epja/s10050-021-00363-5

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] A new formalism of nuclear matter: Tensor-optimized Fermi sphere method2021

    • Author(s)
      Yamada Taiichi
    • Journal Title

      The European Physical Journal A

      Volume: 57 Issue: 2

    • DOI

      10.1140/epja/s10050-021-00383-1

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] α decay to a doubly magic core in the quartetting wave function approach2020

    • Author(s)
      Yang Shuo、Xu Chang、Roepke Gerd、Schuck Peter、Ren Zhongzhou、Funaki Yasuro、Horiuchi Hisashi、Tohsaki Akihiro、Yamada Taiichi、Zhou Bo
    • Journal Title

      Physical Review C

      Volume: 101 Issue: 2

    • DOI

      10.1103/physrevc.101.024316

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Tensor optimized Fermi sphere method for nuclear matter - Power series correlated wave function and a cluster expansion2019

    • Author(s)
      Yamada Taiichi
    • Journal Title

      Annals of Physics

      Volume: 403 Pages: 1-23

    • DOI

      10.1016/j.aop.2019.01.006

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] A nuclear matter calculation with the tensor-optimized Fermi sphere method with central interaction2019

    • Author(s)
      Yamada T、Myo T、Toki H、Horiuchi H、Ikeda K
    • Journal Title

      Progress of Theoretical and Experimental Physics

      Volume: 2019 Issue: 11

    • DOI

      10.1093/ptep/ptz117

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Investigation of isospin-triplet and isospin-singlet pairing in the A=10 nuclei B10,Be10, and C10 with an extension of the Tohsaki-Horiuchi-Schuck-Roepke wave function2019

    • Author(s)
      Zhao Qing、Ren Zhongzhou、Lyu Mengjiao、Horiuchi Hisashi、Kanada-En'yo Yoshiko、Funaki Yasuro、Roepke Gerd、Schuck Peter、Tohsaki Akihiro、Xu Chang、Yamada Taiichi、Zhou Bo
    • Journal Title

      Physical Review C

      Volume: 100 Issue: 1

    • DOI

      10.1103/physrevc.100.014306

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Nuclear electric dipole moment in the cluster model with a triton: Li7 and B112019

    • Author(s)
      Yamanaka Nodoka、Yamada Taiichi、Funaki Yasuro
    • Journal Title

      Physical Review C

      Volume: 100 Issue: 5

    • DOI

      10.1103/physrevc.100.055501

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Nonlocalized motion in a two-dimensional container of α particles in 3- and 4- states of C122019

    • Author(s)
      Zhou Bo、Funaki Yasuro、Horiuchi Hisashi、Kimura Masaaki、Ren Zhongzhou、Roepke Gerd、Schuck Peter、Tohsaki Akihiro、Xu Chang、Yamada Taiichi
    • Journal Title

      Physical Review C

      Volume: 99 Issue: 5 Pages: 1-5

    • DOI

      10.1103/physrevc.99.051303

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Variational calculation of nuclear matter in a finite particle number approach using the unitary correlation operator and high-momentum pair methods2019

    • Author(s)
      Takayuki Myo, Hiroki Takemoto, Mengjiao Lyu, Niu Wan, Chang Xu, Hiroshi Toki, Hisashi Horiuchi, Taiichi Yamada, and Kiyomi Ikeda
    • Journal Title

      Physical Review C

      Volume: 99 Issue: 2 Pages: 024312-024312

    • DOI

      10.1103/physrevc.99.024312

    • Related Report
      2019 Research-status Report 2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Contact representation of short range correlation in light nuclei studied by the High-Momentum Antisymmetrized Molecular Dynamics2019

    • Author(s)
      Qing Zhao, Mengjiao Lyu, Zhongzhou Ren, Takayuki Myo, Hiroshi Toki, Kiyomi Ikeda, Hisashi Horiuchi, Masahiro Isaka, Taiichi Yamada
    • Journal Title

      Physical Review C

      Volume: 99 Issue: 3 Pages: 034311-034311

    • DOI

      10.1103/physrevc.99.034311

    • NAID

      130008147309

    • Related Report
      2019 Research-status Report 2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Investigation of the B9 nucleus and its cluster-nucleon correlations2018

    • Author(s)
      Zhao Qing、Ren Zhongzhou、Lyu Mengjiao、Horiuchi Hisashi、Funaki Yasuro、Ropke Gerd、Schuck Peter、Tohsaki Akihiro、Xu Chang、Yamada Taiichi、Zhou Bo
    • Journal Title

      Physical Review C

      Volume: 97 Issue: 5

    • DOI

      10.1103/physrevc.97.054323

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Tensor-optimized high-momentum antisymmetrized molecular dynamics with a bare interaction, and its application to the He4 nucleus2018

    • Author(s)
      Lyu Mengjiao、Myo Takayuki、Isaka Masahiro、Toki Hiroshi、Ikeda Kiyomi、Horiuchi Hisashi、Suhara Tadahiro、Yamada Taiichi
    • Journal Title

      Physical Review C

      Volume: 98 Issue: 6 Pages: 064002-064002

    • DOI

      10.1103/physrevc.98.064002

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Enhanced 3α radius in 12C probed by nuclear reactions2018

    • Author(s)
      M. Ito, M. Nakao, S. Hirao, Y. Funaki, and T. Yamada
    • Journal Title

      AIP Conference Proceedings

      Volume: 2038 Pages: 020016-020016

    • DOI

      10.1063/1.5078835

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Tensor-optimized antisymmetrized molecular dynamics with bare forces for light nuclei2018

    • Author(s)
      Myo Takayuki、Lyu Mengjiao、Toki Hiroshi、Ikeda Kiyomi、Horiuchi Hisashi、Suhara Tadahiro、Isaka Masahiro、Yamada Taiichi
    • Journal Title

      AIP Conference Proceedings

      Volume: 2038 Pages: 020028-020028

    • DOI

      10.1063/1.5078847

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 20Neにおけるガス的12C+2α構造状態2021

    • Author(s)
      船木靖郎, 山田泰一
    • Organizer
      日本物理学会 2021年秋季大会、オンライン開催
    • Related Report
      2021 Annual Research Report
  • [Presentation] 20Neにおける12C+2αガス状態の研究2021

    • Author(s)
      船木靖郎, 山田泰一
    • Organizer
      日本物理学会第76回年次大会(2021年)、オンライン開催
    • Related Report
      2020 Research-status Report
  • [Presentation] 12C+2α直交条件模型による20Ne励起状態の研究2020

    • Author(s)
      船木靖郎, 山田泰一
    • Organizer
      日本物理学会 2020年秋季大会、オンライン開催
    • Related Report
      2020 Research-status Report
  • [Presentation] Nuclear matter calculation with the tensor optimized Fermi sphere method (TOFS)2019

    • Author(s)
      Yamada Taiichi
    • Organizer
      International Workshop on "Light clusters in nuclei and nuclear matter" at European Centre for Theoretical Studies in Nuclear Physics and Related Areas (ECT*), Trento, Italy, September 2-6 2019
    • Related Report
      2019 Research-status Report
  • [Presentation] 12C+2α直交条件模型を用いた20Ne励起状態の研究2019

    • Author(s)
      船木靖郎、山田泰一
    • Organizer
      日本物理学会秋季大会、2019 9/17-9/20、山形大学(小白川キャンパス)
    • Related Report
      2019 Research-status Report
  • [Presentation] テンソル最適化フェルミ球法(TOFS)とクラスター展開2019

    • Author(s)
      山田泰一
    • Organizer
      日本物理学会第74回年次大会、2019 3/14-3/17、九州大学
    • Related Report
      2018 Research-status Report
  • [Presentation] Contact representation of short range correlation in light nuclei studied by the High-Momentum Antisymmetrized Molecular Dynamics2019

    • Author(s)
      Qing Zhao, Zhongzhou Ren, Mengjiao Lyu, Takayuki Myo, Hiroshi Toki, Kiyomi Ikeda, Hisashi Horiuchi, Masahiro Isaka, Taiichi Yamada
    • Organizer
      日本物理学会第74回年次大会、2019 3/14-3/17、九州大学
    • Related Report
      2018 Research-status Report
  • [Presentation] 高運動量成分を持つ核子対を取り入れた核物質の有限核子数による新しい変分計算法2019

    • Author(s)
      明孝之, 竹本宏輝, Lyu Mengjiao, Wan Niu, Xu Chang, 土岐博, 堀内昶, 池田清美, 山田泰一
    • Organizer
      日本物理学会第74回年次大会、2019 3/14-3/17、九州大学
    • Related Report
      2018 Research-status Report
  • [Presentation] New variational method of tensor-optimized antisymmetrized molecular dynamics with bare nuclear force2018

    • Author(s)
      T. Myo, M. Lyu, M. Isaka, H. Toki, H. Horiuchi, K. Ikeda, T. Suhara, T. Yamada
    • Organizer
      5th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan, October 23-27, 2018; Waikoloa, Hawaii, USA
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Remarks] 関東学院大学・理工学部・山田研究室

    • URL

      http://home.kanto-gakuin.ac.jp/~yamada/

    • Related Report
      2021 Annual Research Report 2019 Research-status Report
  • [Remarks]

    • URL

      http://home.kanto-gakuin.ac.jp/~yamada/

    • Related Report
      2020 Research-status Report
  • [Remarks] http://home.kanto-gakuin.ac.jp/~yamada/

    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2023-01-30  

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