• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Theoretical study of synthesizing superheavy element using changes in shell structure caused by fusion dynamics

Research Project

Project/Area Number 20K04003
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 InstitutionKindai University

Principal Investigator

Aritomo Yoshihiro  近畿大学, 理工学部, 教授 (90573147)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2020: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywords新元素合成 / ニホニウム / 120番元素 / 動力学模型 / 殻構造 / 散逸揺動定理 / ランジュバン方程式 / 中性子過剰核 / 超重元素 / 安定な島
Outline of Research at the Start

本研究では、動力学模型を用いた軌道解析により、変形領域における準安定な状態を経由して球形領域の複合核を形成できるメカニズムの検証、および超重元素生成の蒸発残留核断面積の評価を行うことである。新元素合成のために新しい実験手法の提案を目標とし、標的核・入射核の選択、最適入射エネルギーと生成断面積を提案すること。系統的に蒸発残留核断面積を計算し、原子番号119番以上の元素の合成実験の可能性を示すことである。超重元素領域で重要となる殻構造に対し、軌道計算を繰り返し行い検証することで、融合過程で起こる「動的な殻構造の変動」の現実な利用の提案を行う。

Outline of Final Research Achievements

In this study, by trajectory analysis using a dynamical model, we verified the mechanism by which complex nuclei in the spherical region can be formed via metastable states in the deformation region, and evaluated the cross section of the evaporation residue nucleus for superheavy element formation. The goal was to propose new experimental methods for new nucleosynthesis, and to propose the selection of target nuclei and incident nuclei, the optimal incident energies, and the generation cross sections. We performed the systematically calculation for the evaporative residual cross section and showed the feasibility of synthetic experiments for elements with atomic numbers of 119 and above. By repeating trajectory calculations and verifying the shell structure, which is important in the superheavy element region, we proposed the practical use of the "dynamic shell structure variation" that occurs in the fusion process.

Academic Significance and Societal Importance of the Research Achievements

宇宙に存在できる最も重い元素の探求(人工的な合成)のため、ここでは次の新元素である原子番号119番以上の元素および安定な島の中心の二重魔法核の合成の成功を目指す。そのために、画期的な新しい反応機構を見つけ出し、新機構を利用した実験手法を提案する。現在計画されている実験手法は、従来の手法の延長線上の方法であり、加速器や検出器の性能の向上を図っても、将来にわたる長期的な新元素合成の成功に高い望みは持てない。理論研究の目的としては、融合過程における「動的な殻構造の変化」を最大限に利用した特異で新規な反応メカニズムを追求し明らかにすることである。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (30 results)

All 2022 2021 2020 Other

All Int'l Joint Research (1 results) Journal Article (7 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 7 results,  Open Access: 4 results) Presentation (22 results) (of which Int'l Joint Research: 5 results,  Invited: 2 results)

  • [Int'l Joint Research] CENS/IBS/Pusan National University(韓国)

    • Related Report
      2022 Annual Research Report
  • [Journal Article] Modes of massive nucleon transfer appearing in quasifission processes for collisions of superheavy nuclei2022

    • Author(s)
      Shota Amano, Yoshihiro Aritomo, and Masahisa Ohta
    • Journal Title

      Physical Review C

      Volume: 106 Pages: 0246101-0246108

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Fission mechanism inferred from nuclear shape fluctuation by the Langevin equation2022

    • Author(s)
      Y. Aritomo, A. Iwamoto, K. Nishio, and M. Ohta
    • Journal Title

      Physical Review C

      Volume: 105 Pages: 0346041-034648

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Angular momentum transfer in multinucleon transfer channels of 18O+237Np2022

    • Author(s)
      S. Tanaka, K. Hirose, K. Nishio, K. R. Kean, H. Makii, R. Orlandi, K. Tsukada, and Y. Aritomo
    • Journal Title

      Physical Review C

      Volume: 105 Pages: 216021-216025

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Fusion cross section and total kinetic energy of fission fragments by the dynamical dissipative surface-friction model2022

    • Author(s)
      S. Amano, Y. Aritomo, M. Ohta
    • Journal Title

      Eurasian Journal of Physics and Functional Materials

      Volume: 6 Pages: 6-17

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Estimation of synthesizing new superheavy elements using dynamical model2020

    • Author(s)
      Yoshihiro Aritomo, Shota Amano, Mizuki Okubayashi, Baku Yanagi, Katsuhisa Nishio, and Masahisa Ohta
    • Journal Title

      Physics of Atomic Nuclei

      Volume: 83 Pages: 545-549

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Measurement of fission-fragment mass distributions in the multinucleon transfer channels of the 18O+237Np reaction2020

    • Author(s)
      M. J. Vermeulen, K. Nishio, K. Hirose, K. R. Kean, H. Makii, R. Orlandi, K. Tsukada, I. Tsekhanovich, A. N. Andreyev, S. Ishizaki, M. Okubayashi, S. Tanaka, and Y. Aritomo
    • Journal Title

      Phys. Rev. C

      Volume: 102 Pages: 0546101-11

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Modeling of Nuclear Reactions with Langevin Calculations2020

    • Author(s)
      S. Amano, Y. Aritomo, Y. Miyamoto, S. Ishizaki, M. Okubayashi
    • Journal Title

      Bulletin of the Russian Academy of Sciences: Physics

      Volume: 84 Pages: 1034-1038

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Nuclear reaction in superheavy mass region with Langevin calculation2022

    • Author(s)
      Y. Aritomo
    • Organizer
      Focus Program: A quest for exotica in rare-earth elements
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 動力学模型による核分裂ダイナミクスの解析と今後の展望2022

    • Author(s)
      有友嘉浩
    • 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 Annual Research Report
    • Invited
  • [Presentation] Evaluation of synthesizing new superheavy element based on dynamical shell structure during fusion process2022

    • Author(s)
      Shinya Takagi, Shota Amano, Shoma Yamamoto, Yoshihiro Aritomo
    • Organizer
      the 15th Asia Pacific Physics Conference (APPC15)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Evaluation of capture cross-sections for synthesis of superheavy elements using dynamical model2022

    • Author(s)
      Hokuto Maekawa, Shota Amano, Shinya Takagi, Yoshihiro Aritomo, Tathagata Banerjee
    • Organizer
      the 15th Asia Pacific Physics Conference (APPC15)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Fission fragment distributions of neutron-rich nuclei based on Langevin calculations in the r-process region2022

    • Author(s)
      Itoshi Nishimura, Nobuya Nishimura, Shoya Tanaka, Wataru Miyasakai, Shynya Takagi, Masahisa Ohta, and Yoshihiro Aritomo
    • Organizer
      Nuclear Physics in Astrophysics -X
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The impacts of dynamical nuclear fission for neutron-rich actinoids on r-process nucleosynthesis2022

    • Author(s)
      Nobuya Nishimura, Shoya Tanaka, Itoshi Nishimura, Wataru Miyasakai, Shinya Takagi, Yoshihiro Aritomo, Masahisa Ohta
    • Organizer
      Nuclear Physics in Astrophysics X
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 超重元素領域における中性子過剰核の生成確率の評価2022

    • Author(s)
      有友嘉浩, 芝田啓悟, 浅見明宏、西川勝麻, 高木慎弥, 前川北斗, 天野翔太
    • Organizer
      原子核におけるクラスター物理の新展開
    • Related Report
      2022 Annual Research Report
  • [Presentation] 新元素合成における中性子過剰核を利用した融合反応機構の評価2022

    • Author(s)
      高木慎弥, 天野翔太, 有友嘉浩
    • Organizer
      原子核におけるクラスター物理の新展開
    • Related Report
      2022 Annual Research Report
  • [Presentation] Theoretical estimation of synthesizing neutron rich nuclei in superheavy mass region2022

    • Author(s)
      SNishikawa, Y.Aritomo, S.Takagi, H.Maekawa, S.Amano, K.Shibata, A.Asami
    • Organizer
      Symposium on Nuclear Data 2022
    • Related Report
      2022 Annual Research Report
  • [Presentation] Theoretical study of low-excitation fission phenomena in unstable thorium isotopes2022

    • Author(s)
      Wataru Miyasakai, Yoshihiro Aritomo, Shinya Takagi
    • Organizer
      Symposium on Nuclear Data 2022
    • Related Report
      2022 Annual Research Report
  • [Presentation] 超重元素領域における中性子過剰核の生成確率の理論的評価2022

    • Author(s)
      有友嘉浩, 天野翔太, 高木慎弥, 岡嵜玲也, 太田雅久, 西尾勝久, 岩本昭
    • Organizer
      中性子捕獲反応で迫る宇宙の元素合成
    • Related Report
      2022 Annual Research Report
  • [Presentation] 超重元素領域における中性子過剰核生成の理論的評価2022

    • Author(s)
      有友嘉浩, 高木慎弥, 前川北斗, Chang-hoon Song, Ik Jae Shin, Youngman Kim, Chang-Hwan Lee
    • Organizer
      日本物理学会 2022年秋季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 新元素合成に向けた中性子過剰核を利用した融合反応機構の研究2022

    • Author(s)
      髙木慎弥, 天野翔太, 山本匠真, 有友嘉浩
    • Organizer
      日本物理学会 2022年秋季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 動力学模型を用いた超重元素合成の捕獲断面積の研究2022

    • Author(s)
      前川北斗, 天野翔太, 高木慎弥, 有友嘉浩, Tathagata Banerjee
    • Organizer
      日本物理学会 2022年秋季大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 融合過程における殻構造変化を利用した新元素生成可能性の評価2022

    • Author(s)
      髙木慎弥, 天野翔太, 宮堺渉, 山本匠真, 有友嘉浩
    • Organizer
      日本物理学会 第77回年次大会
    • Related Report
      2021 Research-status Report
  • [Presentation] アクチノイド領域における原子核の構造と反応ダイナミクスに与える影響2021

    • Author(s)
      有友嘉浩, 高木慎弥, 津野大海, 前川北斗, 西村絃志, 西尾勝久, 西村信哉
    • Organizer
      日本物理学会 2021年秋季大会
    • Related Report
      2021 Research-status Report
  • [Presentation] 融合ダイナミクスに起因する殻構造の変化を利用した未知超重元素生成の理論研究2021

    • Author(s)
      高木慎弥,天野翔太 山本匠真 有友嘉浩
    • Organizer
      基研研究会 核力に基づいた原子核の構造と反応
    • Related Report
      2021 Research-status Report
  • [Presentation] Neutron emission during fission process by dynamical model2020

    • Author(s)
      山崎僚太、田中翔也、有友嘉浩、西尾勝久
    • Organizer
      2020年度核データ研究会
    • Related Report
      2020 Research-status Report
  • [Presentation] The origin of correlation between mass and angle in quasi-fission2020

    • Author(s)
      天野翔太、有友嘉浩、石崎翔馬、奥林瑞貴、奥川誠也
    • Organizer
      2020年度核データ研究会
    • Related Report
      2020 Research-status Report
  • [Presentation] 核子移行反応による超重元素生成過程のダイナミクスの解析2020

    • Author(s)
      天野翔太, 有友嘉浩, 石崎翔馬, 奥林瑞貴
    • Organizer
      日本物理学会
    • Related Report
      2020 Research-status Report
  • [Presentation] 超重元素合成に関する系統的な生成確率評価手法の開発2020

    • Author(s)
      有友嘉浩, 高木慎弥, 泉拓実, 天野翔太, 太田雅久, 西尾勝久
    • Organizer
      日本物理学会
    • Related Report
      2020 Research-status Report
  • [Presentation] 核分裂過程での中性子放出を考慮した動力学模型の開発2020

    • Author(s)
      山崎僚太, 田中翔也, 有友嘉浩, 西尾勝久
    • Organizer
      日本物理学会
    • Related Report
      2020 Research-status Report

URL: 

Published: 2020-04-28   Modified: 2024-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi