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Confirmation of the linear cluster chain state in atomic nucleus

Research Project

Project/Area Number 19K03883
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 15020:Experimental studies related to particle-, nuclear-, cosmic ray and astro-physics
Research InstitutionThe University of Tokyo

Principal Investigator

Yamaguchi Hidetoshi  東京大学, 大学院理学系研究科(理学部), 講師 (30376529)

Co-Investigator(Kenkyū-buntansha) 早川 勢也  東京大学, 大学院理学系研究科(理学部), 特任助教 (00747743)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords原子核クラスター / 直鎖状態 / 不安定核 / 共鳴散乱 / 炭素-14 / 酸素-14
Outline of Research at the Start

原子核は形状を持ちうる物体の中で、最も微小なものであると認識されている。原子核の形状は多くの場合真球であり、稀に楕球に変形することが知られている。1950年代に、α粒子3つが一列に配列する、特殊な直鎖状原子核が理論的に提案されたが、そのような直鎖状態の確たる実験的証拠は、長年見つからなかった。本研究は、代表者が2017年に発表した炭素-14原子核の直鎖状態の兆しを、多面的に再検証し、直鎖状態に関する確たる理解を得るものである。

Outline of Final Research Achievements

A 10Be+alpha resonant scattering experiment to search linear chain cluster state in the 14C nucleus was scheduled at INFN-LNS, Italy in 2020, however, postponed due to the COVID-19 pandemic.
On the other hand, we carried out a 10C+alpha resonant scattering experiment to study the resonance states in the mirror nucleus 14O, in collaboration with a Belgian group. The data analysis has been almost completed, where we observed many resonance states. A particularly interesting result was that we found several candidates of the linear-chain cluster states, similar to the ones in 14C.
We are planning to publish the result as a paper in the near future.

Academic Significance and Societal Importance of the Research Achievements

直鎖クラスター状態は原子核の特殊な形態の1つとして1950年台から予言されたものであるが、未だに確実な証拠が得られていない。研究代表者は2017年の論文で初めて直鎖クラスター状態の存在を示唆する強い証拠を提示したが、本研究で別の原子核における新たなる実験的証拠をつかむことに成功した。この結果は今後の原子核クラスター研究に大きなインパクトを与えることが期待される。
更に、原子核は形状を持つことが確認された物質のうち最も小さいものであり、本研究は、その原子核の形状を直鎖状に配位させる技術的な一歩という意味でも興味深い。

Report

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

    (40 results)

All 2022 2021 2020 2019 Other

All Int'l Joint Research (12 results) Journal Article (18 results) (of which Int'l Joint Research: 18 results,  Peer Reviewed: 18 results,  Open Access: 2 results) Presentation (10 results) (of which Int'l Joint Research: 8 results,  Invited: 4 results)

  • [Int'l Joint Research] Institute of Modern Physics/CIAE/Beihang University(中国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Universite libre de Bruxelles(ベルギー)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] INFN/University of Catania/University of Padova(イタリア)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] 成均館大学(韓国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] University of Edinburgh(英国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research]

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Institute of Modern Physics/CIAE/Beihang University(中国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] Universite libre de Bruxelles(ベルギー)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] INFN/University of Catania/University of Padova(イタリア)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] 成均館大学(韓国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] University of Edinburgh(英国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research]

    • Related Report
      2019 Research-status Report
  • [Journal Article] Supernova Nucleosynthesis, Radioactive Nuclear Reactions and Neutrino-Mass Hierarchy2022

    • Author(s)
      Yao Xingqun、Kusakabe Motohiko、Kajino Toshitaka、Cherubini Silvio、Hayakawa Seiya、Yamaguchi Hidetoshi
    • Journal Title

      EPJ Web of Conferences

      Volume: 260 Pages: 01007-01007

    • DOI

      10.1051/epjconf/202226001007

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Experimental studies on astrophysical reactions at the low-energy RI beam separator CRIB2022

    • Author(s)
      Yamaguchi H.、Hayakawa S.、Ma N.R.、Shimizu H.、Okawa K.、Yang L.、Kahl D.、La Cognata M.、Lamia L.、Abe K.、Beliuskina O.、Cha S.M.、Chae K.Y.、et al.
    • Journal Title

      EPJ Web of Conferences

      Volume: 260 Pages: 03003-03003

    • DOI

      10.1051/epjconf/202226003003

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] First measurement of 25Al+p resonant scattering relevant to the astrophysical reaction 22Mg(α, p)25Al2022

    • Author(s)
      Hu J.、Yamaguchi H.、Lam Y.H.、Heger A.、Kahl D.、Jacobs A.M.、Johnston Z.、Xu S.W.、Zhang N.T.、Ma S.B.、Ru L.H.、Liu E.Q.、et al.
    • Journal Title

      EPJ Web of Conferences

      Volume: 260 Pages: 05001-05001

    • DOI

      10.1051/epjconf/202226005001

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Constraining the Primordial Lithium Abundance: New Cross Section Measurement of the <sup>7</sup>Be + n Reactions Updates the Total 7Be Destruction Rate2021

    • Author(s)
      Hayakawa S.、La Cognata M.、Lamia L.、Yamaguchi H.、Kahl D.、Abe K.、Shimizu H.、Yang L.、Beliuskina et al.,
    • Journal Title

      The Astrophysical Journal Letters

      Volume: 915 Issue: 1 Pages: L13-L13

    • DOI

      10.3847/2041-8213/ac061f

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] The 27Al(p,α)24Mg reaction at astrophysical energies studied by means of the Trojan Horse Method applied to the 2H(27Al, α 24Mg)n reaction2021

    • Author(s)
      Palmerini S.、La Cognata M.、Hammache F.、Acosta L.、Alba R.、Burjan V.、Chevez E.、Cherubini S.、Cvetinovic A.、D’Agata G.、de Sereville N.、et al.
    • Journal Title

      The European Physical Journal Plus

      Volume: 136 Issue: 9

    • DOI

      10.1140/epjp/s13360-021-01872-4

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Advancement of Photospheric Radius Expansion and Clocked Type-I X-Ray Burst Models with the New 22Mg(a,p)25Al Reaction Rate Determined at the Gamow Energy2021

    • Author(s)
      Hu J.、Yamaguchi H.、Lam Y.H.、Heger A.、Kahl D.、Jacobs A.M.、Johnston Z.、Xu S.W.、Zhang N. et al.
    • Journal Title

      Physical Review Letters

      Volume: 127 Issue: 17 Pages: 172701-172701

    • DOI

      10.1103/physrevlett.127.172701

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Insight into the reaction dynamics of proton drip-line nuclear system 17F+58Ni at near-barrier energies2021

    • Author(s)
      Yang L.、Lin C.J.、Yamaguchi H.、Lei Jin、Wen P.W.、Mazzocco M.、Ma N.R.、Sun L.J.、Wang D.X.、Zhang G.X.、Abe K.、Cha S.M.、et al.
    • Journal Title

      Physics Letters B

      Volume: 813 Pages: 136045-136045

    • DOI

      10.1016/j.physletb.2020.136045

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Studies on Nuclear Astrophysics and Nuclear Clustering with Low-energy RI Beams at CRIB2020

    • Author(s)
      Yamaguchi H.、Hayakawa S.、Yang L.、Shimizu H.、Kahl D.、Suhara T.、Iwasa N.、Cha S. M.、Kwag M. S.、Lee J. H.、Lee E. J.、Chae K. Y.、Kim A.、Kim D. H.、Wakabayashi Y.、Imai N.、Kitamura N.、Lee P.、Moon J. Y.、Lee K. B.、Akers C.、Duy N. N.、Khiem L. H.、Lee C. S.
    • Journal Title

      JPS Conf. Proc.

      Volume: 32 Pages: 010055-010055

    • DOI

      10.7566/jpscp.32.010055

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Study of the contribution of the 7Be(d, p) reaction to the 7Li problem in the Big-Bang Nucleosynthesis2020

    • Author(s)
      Inoue Azusa、Tamii Atsushi、Chan Phaikying、Hayakawa Seiya、Kobayashi Nobuyuki、Maeda Yukie、Nonaka Kotaro、Shima Tatsushi、Shimizu Hideki、Tran Dinh Trong、Wang Xuan、Yamaguchi Hidetoshi、Yang Lei、Yang Zaihong
    • Journal Title

      Journal of Physics: Conference Series

      Volume: 1643 Issue: 1 Pages: 012049-012049

    • DOI

      10.1088/1742-6596/1643/1/012049

    • NAID

      130008148330

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Experiments on astrophysical reactions with low-energy unstable nuclei beams at CRIB2020

    • Author(s)
      Yamaguchi H.、Hayakawa S.、Ma N.R.、Shimizu H.、Yang L.、Kahl D.、Abe K.、Suhara T.、Iwasa N.、Kim A.、et al.
    • Journal Title

      Journal of Physics: Conference Series

      Volume: 1643 Issue: 1 Pages: 012069-012069

    • DOI

      10.1088/1742-6596/1643/1/012069

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Direct processes for the systems 7Be,8B + 208Pb at Coulomb barrier energies2020

    • Author(s)
      Mazzocco M、Keeley N、Boiano A、Boiano C、Commara M La、Lagni A、Manea C、Parascandolo C、Pierroutsakou D、Signorini C、Strano E、Torresi D、Yamaguchi H、et al.
    • Journal Title

      Journal of Physics: Conference Series

      Volume: 1643 Issue: 1 Pages: 012096-012096

    • DOI

      10.1088/1742-6596/1643/1/012096

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Study on 26mAl(p, γ) Reaction at the SNe Temperature2020

    • Author(s)
      Shimizu H.、Kahl D.、Yamaguchi H.、Abe K.、Beliuskina O.、Cha S. M.、Chae K. Y.、Chen A. A.、Ge Z.、Hayakawa S.、Imai N.、Iwasa N.、Kim A.、Kim D. H.、Kim M. J.、Kubono S.、Kawag M. S.、Liang J.、Moon J. Y.、Nishimura S.、Oka S.、Park S. Y.、Psaltis A.、Teranishi T.、Ueno Y.、Yang L.
    • Journal Title

      JPS Conf. Proc.

      Volume: 31 Pages: 011073-011073

    • DOI

      10.7566/jpscp.31.011073

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Experimental Study on the 7Be(n,p)7Li and the 7Be(n,α)4He Reactions for Cosmological Lithium Problem2020

    • Author(s)
      Hayakawa S.、La Cognata M.、Lamia L.、Shimizu H.、Yang L.、Yamaguchi H.、Abe K.、Beliuskina O.、Cha S. M.、Chae K. Y.、Cherubini S.、Figuera P.、Ge Z.、Gulino M.、Hu J.、Inoue A. et al.
    • Journal Title

      JPS Conf. Proc.

      Volume: 31 Pages: 011036-011036

    • DOI

      10.7566/jpscp.31.011036

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] MITA: A Multilayer Ionization-chamber Telescope Array for low-energy reactions with exotic nuclei2019

    • Author(s)
      Ma N. R.、Yang L.、Lin C. J.、Yamaguchi H.、Wang D. X.、Sun L. J.、Mazzocco M.、Jia H. M.、Hayakawa S.、Kahl D.、Cha S. M.、Zhang G. X.、Yang F.、Yang Y. Y.、Signorini C. et al.
    • Journal Title

      The European Physical Journal A

      Volume: 55 Issue: 6 Pages: 87-87

    • DOI

      10.1140/epja/i2019-12765-7

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Elastic scattering for the B8 and Be7+Pb208 systems at near-Coulomb barrier energies2019

    • Author(s)
      Mazzocco M.、Keeley N.、Boiano A.、Boiano C.、La Commara M.、Manea C.、Parascandolo C.、Pierroutsakou D.、Signorini C.、Strano E.、Torresi D.、Yamaguchi H.、Kahl D. et al.
    • Journal Title

      Physical Review C

      Volume: 100 Issue: 2 Pages: 024602-024602

    • DOI

      10.1103/physrevc.100.024602

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Cross Section Measurements of the 7Be(n,p)7Li and the 7Be(n,α)4He Reactions Covering the Big-Bang Nucleosynthesis Energy Range by the Trojan Horse Method at CRIB2019

    • Author(s)
      Hayakawa S.、Abe K.、Beliuskina O.、Cha S. M.、Chae K. Y.、Cherubini S.、Figuera P.、Ge Z.、Gulino M.、Hu J.、Inoue A.、Iwasa N.、Kahl D.、Kim A.、Kim D. H.、Kiss G. G. et al.
    • Journal Title

      Nuclei in the Cosmos XV

      Volume: 1 Pages: 33-37

    • DOI

      10.1007/978-3-030-13876-9_6

    • ISBN
      9783030138752, 9783030138769
    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Study on Explosive Nucleosynthesis with Low-Energy RI Beams at CRIB2019

    • Author(s)
      Yamaguchi H.、CRIB Collaboration、Hayakawa S.、Yang L.、Shimizu H.、Kahl D.
    • Journal Title

      Nuclei in the Cosmos XV

      Volume: 1 Pages: 265-268

    • DOI

      10.1007/978-3-030-13876-9_44

    • ISBN
      9783030138752, 9783030138769
    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] The Cosmologically Relevant 7Be(n, α)4He Reaction in View of the Recent THM Investigations2019

    • Author(s)
      Lamia L.、Spitaleri C.、Mazzocco M.、Hayakawa S.、Bertulani C. A.、Boiano A.、Boiano C.、Broggini Carlo、Caciolli Antonio、Depalo Rosanna、Galtarossa F.、Guardo G. L.、Gulino M.、et al.
    • Journal Title

      Nuclei in the Cosmos XV

      Volume: 1 Pages: 53-56

    • DOI

      10.1007/978-3-030-13876-9_9

    • ISBN
      9783030138752, 9783030138769
    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Experimental studies on astrophysical reactions at the low-energy RI beam separator CRIB2021

    • Author(s)
      H. Yamaguchi
    • Organizer
      The 16th International Symposium on Nuclei in the Cosmos (NIC-XVI)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Cluster states and astrophysical (alpha, p) reactions2021

    • Author(s)
      H. Yamaguchi
    • Organizer
      RCNP Workshop, "Cluster phenomena in knockout and astrophysical reactions"
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Overview of alpha resonant scattering experiments at CRIB2021

    • Author(s)
      H. Yamaguchi
    • Organizer
      International mini-workshop on “Physics in resonant reaction induced by low-energy RI beam''
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Activities at the low-energy RI beam separator CRIB2020

    • Author(s)
      H. Yamaguchi
    • Organizer
      RIBF Users Meeting 2020
    • Related Report
      2020 Research-status Report
  • [Presentation] Studying Astrophysical reactions and Nuclear Clusters with with low-energy RI beams2019

    • Author(s)
      H. Yamaguchi
    • Organizer
      2019 KPS Spring Meeting, Pioneering session: Low energy nuclear science for astrophysics
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Experiments on astrophysical reactions with low-energy unstable nuclei beams a t CRIB2019

    • Author(s)
      H. Yamaguchi
    • Organizer
      The 27th International Nuclear Physics Conference (INPC 2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Nuclear Astrophysics with low-energy RI beam2019

    • Author(s)
      H. Yamaguchi
    • Organizer
      NUclear physics School for Young Scientists (NUSYS-2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Activities at the low-energy RI beam separator CRIB2019

    • Author(s)
      H. Yamaguchi
    • Organizer
      RIBF Users Meeting 2019
    • Related Report
      2019 Research-status Report
  • [Presentation] Nuclear Astrophysics Projects at CNS, the University of Tokyo2019

    • Author(s)
      H. Yamaguchi
    • Organizer
      International workshop on Origin of Elements and Cosmic Evolution: From Big-Bang to Supernovae and Merg ers (OECE)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Active target for the TTIK method2019

    • Author(s)
      H. Yamaguchi
    • Organizer
      Workshop on RI-beam Spectroscopy by Innovative Gaseous Active Targets
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2023-01-30  

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