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2008 Fiscal Year Annual Research Report

不安定核構造の統一的記述

Research Project

Project/Area Number 20244022
Research InstitutionThe University of Tokyo

Principal Investigator

大塚 孝治  The University of Tokyo, 大学院・理学系研究科, 教授 (20201379)

Co-Investigator(Kenkyū-buntansha) 清水 則孝  東京大学, 大学院・理学系研究科, 助教 (30419254)
Keywords不安定核 / 魔法数 / 殻模型 / 平均場模型 / 核力 / デルタ粒子 / 3体力 / pf殻
Research Abstract

安定線とドリップラインの間にある多数の不安定核の構造を、核力に忠実に解明するのが基本自的である。p殻原子核については17C及び周辺核の性質を調べて、論文を発表した。テンソルカを適切に含むように改良した有効核力がいい結果を出した。N=20魔法数についての研究をさらに発展させ、KC1,Mg,Alなどの原子核の構造を計算して最新の実験と比べた。テンソルカによる殻進化が観測可能なデータに反映されるのが示され、Physical Review C,Physical Review Lettersなどの学術誌で発表した。平成20年度での大きな進展の一つは、核力の中でも3体力と呼ばれるものの効果を初めて定量的に明らかにしたことにある。酸素の不安定核のドリップラインは、2体力だけの理論計算では再現されないことが知られていたが、デルタ粒子に起源をおく藤田宮沢3体力の効果を取り入れることにより、それがきれいに解決された。現在論文を投稿準備中である。酸素アイソトープの連続状態への励起スペクトルを核力を考慮した理論で記述する連続状態結合殻模型を提唱し、24,250の最近のデータを見事に予言していることを示した。この論文は投稿済で、レフェり一審査中である。重い原子核については、旧来型の平均場模型を改良してテンソルカや有限レンジのLS力を取り入れた新しいGogny型相互作用によ1る計算が成功し、多くの興味深い結果を出した。研究協力者の博士論文になったが、投稿も準備中である。重い原子核での平均場模型から励起エネルギーなどを求めるのは難しいので、ポテンシャルエネルギー面から相互作用するボソン模型のハミルトニアンを決める方法を提案し、多くの原子核で成功を見た。研究協力者の修士論文になり、又、Physical Review Letters誌に論文を発表した。その他、pf殼にg9/2軌道を加える計算は終了し、論文準備中である。

  • Research Products

    (39 results)

All 2009 2008

All Journal Article (7 results) (of which Peer Reviewed: 6 results) Presentation (32 results)

  • [Journal Article] New formulation of Interacting Boson Model and heavy exotic nuclei2009

    • Author(s)
      K. Nomura, N. Shimizu, and T. Otsuka
    • Journal Title

      Acta Physica Polonica B40

      Pages: 603

    • Peer Reviewed
  • [Journal Article] "Reduced Charge Equilibration in Heavy-Ion Collisions at Higher Energies"2009

    • Author(s)
      Y. Iwata, T. Otsuka, J. A. Maruhn, and N. Itagaki
    • Journal Title

      AIP conference proceedings 1098

      Pages: 308-313

    • Peer Reviewed
  • [Journal Article] Exotic Magnetic Properties in C-172008

    • Author(s)
      T. Suzuki, T. Otsuka
    • Journal Title

      Physical Review C 78

      Pages: 061301

    • Peer Reviewed
  • [Journal Article] Mean-field derivation of the interacting boson model Hamiltonian and exotic nuclei2008

    • Author(s)
      K.Nomura, N. Shimizu, T. Otsuka
    • Journal Title

      Physical Review Letters 101

      Pages: 142501

    • Peer Reviewed
  • [Journal Article] Intruder Configurations in the A=33 isobars: Mg-33 and A1-332008

    • Author(s)
      V. Tripathi, T. Otsuka,他
    • Journal Title

      Physical Review Letters 101

      Pages: 142504

    • Peer Reviewed
  • [Journal Article] New microscopic foundation of Interacting Boson Model and collectivities in exotic nuclei2008

    • Author(s)
      K.Nomura, N. Shimizu, T. Otsuka
    • Journal Title

      AIP Conference Proceedings 1090

      Pages: 313-317

  • [Journal Article] "The Competitive Reaction Mechanism in Exotic Nuclear Reactions"2008

    • Author(s)
      Yoritaka Iwata, Naoyuki Itagaki, Joachim A. Maruhn, and Takaharu Otsuka
    • Journal Title

      Int. J. Mod. Phys. E 17

      Pages: 1660-1668

    • Peer Reviewed
  • [Presentation] 平均場理論を用いたIBMハミルトニアンの導出と不安定核の構造2009

    • Author(s)
      野村昴亮
    • Organizer
      日本物理学会第64回年次大会
    • Place of Presentation
      立教大学、東京都豊島区
    • Year and Date
      20090323-26
  • [Presentation] Mean-field derivation of the IBM and exotic nuclei2009

    • Author(s)
      野村昴亮
    • Organizer
      LIA-EFES Workshop (Low-energy collective excitations in exotic nuclei)
    • Place of Presentation
      GANIL, Caen, Fraue
    • Year and Date
      20090302-04
  • [Presentation] 低エネルギー重イオン衝突における衝突方向依存性2009

    • Author(s)
      岩田順敬大塚孝治板垣直之西尾勝久
    • Organizer
      日本物理学会・年会
    • Place of Presentation
      立教大学
    • Year and Date
      2009-03-28
  • [Presentation] From Unitary Correlation Operator Method to Shell Model calculation2009

    • Author(s)
      Liu Lang
    • Organizer
      日本物理学界2009年春季大会
    • Place of Presentation
      立教大学
    • Year and Date
      2009-03-27
  • [Presentation] Similarity Renormalization Group to the Nuclear Shell Model2009

    • Author(s)
      月山幸志郎、ScottBogner,Achim Schwenk
    • Organizer
      日本物理学会2009年春季大会
    • Place of Presentation
      立教大学
    • Year and Date
      2009-03-27
  • [Presentation] Dynamical symmetry in spinor Bose-Einstein condensates2009

    • Author(s)
      S. Uchino, T. Otsuka, and M. Ueda
    • Organizer
      LIA-EFES Workshop
    • Place of Presentation
      Caen, Franc
    • Year and Date
      2009-03-03
  • [Presentation] Similarity Renormalization Group to the Nuclear Shell Model2009

    • Author(s)
      月山幸志郎、ScottBogner,Achim Schwenk
    • Organizer
      The 3rd LACM-JUSTIPEN-EFES Workshop
    • Place of Presentation
      ORNL(アメリカ)
    • Year and Date
      2009-02-25
  • [Presentation] "Charge and mass distributions based on the time-dependent Hartree-Fock theory"2009

    • Author(s)
      Yoritaka Iwata
    • Organizer
      The 3rd LACM-EFES-JUSTIPEN Workshop
    • Place of Presentation
      Oakridge National Laboratory ,USA
    • Year and Date
      2009-02-24
  • [Presentation] "Dynamics of low-energy heavy-ion collisions and the synthesis of exotic nuclei"2009

    • Author(s)
      Yoritaka Iwata
    • Organizer
      EENEN 09
    • Place of Presentation
      GSI, Germany
    • Year and Date
      2009-02-10
  • [Presentation] Similarity Renormalization Group to the Nuclear Shell Model2009

    • Author(s)
      月山幸志郎、ScottBogner,Achim Schwenk
    • Organizer
      ENNEN09
    • Place of Presentation
      GSI(ドイツ)
    • Year and Date
      2009-02-09
  • [Presentation] 平均場模型を用いたIBMの導出と不安定核の集団運動2008

    • Author(s)
      野村昴亮
    • Organizer
      日本物理学会第秋季大会
    • Place of Presentation
      山形大学、山形市
    • Year and Date
      20080921-24
  • [Presentation] Mean-field foundation of Interacting Boson Model and collectivities in exotic nuclei2008

    • Author(s)
      野村昴亮
    • Organizer
      5th International Conference on Exotic Nuclei and Atomic Masses
    • Place of Presentation
      Ryn, Poland
    • Year and Date
      20080907-13
  • [Presentation] New formulation of Interacting Boson Model and heavy exotic nuclei2008

    • Author(s)
      野村昴亮
    • Organizer
      Zakopane Conference on Nuclear Physics
    • Place of Presentation
      University of Cologne, Cologne, Germany
    • Year and Date
      20080825-29
  • [Presentation] Mean-field foundation of Interacting Boson Model and collectivities in exotic nuclei2008

    • Author(s)
      野村昴亮
    • Organizer
      7th Summer School on Exotic Beam Physics
    • Place of Presentation
      Argonne National Labor atory, USA
    • Year and Date
      20080803-10
  • [Presentation] New microscopic foundation of Interacting Boson Model and collectivities in exotic nuclei2008

    • Author(s)
      野村昴亮
    • Organizer
      13th International Symposium on Capture Gamma-Ray Spectroscopy and Related Topics
    • Place of Presentation
      Argonne National Laboratory, USA .
    • Year and Date
      20080803-10
  • [Presentation] New microscopic foundation of the Interacting Boson Model and the structure of exotic nucleiei2008

    • Author(s)
      野村昴亮
    • Organizer
      The 3rd LACM-EFES-JUSTIPEN Workshop
    • Place of Presentation
      Oak Ridge, Tennessee, USA
    • Year and Date
      20080223-25
  • [Presentation] "Unique existence of global-in-time solution for TDHF equations"2008

    • Author(s)
      Yoritaka Iwata
    • Organizer
      SCPDE 2008
    • Place of Presentation
      Hong Kong, China
    • Year and Date
      2008-12-10
  • [Presentation] From Unitary Correlation Operator Method to Shell Model Calculation2008

    • Author(s)
      Liu Lang
    • Organizer
      2nd yonsei-Tokyo Workshop onPhysics
    • Place of Presentation
      延世大学(韓国)
    • Year and Date
      2008-10-30
  • [Presentation] Continuum Effects for Exotic Nuclei2008

    • Author(s)
      月山幸志郎、大塚孝治、藤本林太郎、Morten Hlorth-Jensen
    • Organizer
      2nd yonsei-Tokyo Workshop onPhysics
    • Place of Presentation
      延世大学(韓国)
    • Year and Date
      2008-10-30
  • [Presentation] Dynamical symmetry in spinor Bose-Einstein condensates2008

    • Author(s)
      S. Uchino, T. Otsuka, and M. Ueda
    • Organizer
      Tokyo-Yonsei Joint Workshop on Physics
    • Place of Presentation
      Yonsei, Korea
    • Year and Date
      2008-10-30
  • [Presentation] Algebraic aspect in spinor Bose-Einstein condensates2008

    • Author(s)
      S. Uchino, T. Otsuka, and M. Ueda
    • Organizer
      Frontiers of Degenerate Quantum Gases
    • Place of Presentation
      Beijing, China
    • Year and Date
      2008-10-23
  • [Presentation] "Reduced charge equilibration in heavy-ion collisions at higher energies and synthesis of exotic nuclei"2008

    • Author(s)
      Yoritaka Iwata
    • Organizer
      Fusion 08,
    • Place of Presentation
      Chicago, USA
    • Year and Date
      2008-09-26
  • [Presentation] 中性子過剰核における連続状態の効果2008

    • Author(s)
      月山幸志郎、大塚孝治、藤本林太郎、MortenHlorth-Jensen
    • Organizer
      日本物理学界2008年秋季大会
    • Place of Presentation
      山形大学
    • Year and Date
      2008-09-20
  • [Presentation] SpinOr BEC and IBM2008

    • Author(s)
      S. Uchino, T. Otsuka, and M. Ueda
    • Organizer
      日本物理学会
    • Place of Presentation
      山形
    • Year and Date
      2008-09-20
  • [Presentation] "Reduced charge equilibration in heavy-ion collisions at higher energies and synthesis of exotic nuclei",2008

    • Author(s)
      Yoritaka Iwata
    • Organizer
      ENAM '08,
    • Place of Presentation
      Ryn, Poland
    • Year and Date
      2008-09-11
  • [Presentation] Continuum effects for drip-line oxygen isotopes2008

    • Author(s)
      月山幸志郎、大塚孝治、藤本林太郎、MortenHjorth-Jensen
    • Organizer
      7th CNS-EFES Summer school
    • Place of Presentation
      理化学研究所
    • Year and Date
      2008-08-26
  • [Presentation] Continuum effects for lowlying states in drip-line oxygen isotopes2008

    • Author(s)
      月山幸志郎、大塚孝治、藤本林太郎、MortenHjorth-Jensen
    • Organizer
      TRIUMF Summer institute2008
    • Place of Presentation
      TRIUMF(カナダ)
    • Year and Date
      2008-08-14
  • [Presentation] Continuum effects for drip-line oxygen isotopes2008

    • Author(s)
      月山幸志郎、大塚孝治、藤本林太郎、Morten Hjorth-Jensen
    • Organizer
      JUSTIPEN-EFES-Hokudai-UNEDF meeting
    • Place of Presentation
      北海道、大沼
    • Year and Date
      2008-07-23
  • [Presentation] alpha-cluster structure in light nuclei with pairing correla tions2008

    • Author(s)
      Liu Lang
    • Organizer
      JUSTIPEN-EFES-Hokudai-UNEDF meeting
    • Place of Presentation
      北海道、大沼
    • Year and Date
      2008-07-22
  • [Presentation] "Reduced charge equilibration in heavy-ion collisions at higher energies and synthesis of exotic nuclei"2008

    • Author(s)
      Yoritaka Iwata
    • Organizer
      Workshop on "Frontier in Unstable Nuclear Physics"
    • Place of Presentation
      北海道大学
    • Year and Date
      2008-07-18
  • [Presentation] "TDHFによる低エネルギー核反応"2008

    • Author(s)
      岩田順敬
    • Organizer
      京都大学基礎物理学研究所研究会
    • Place of Presentation
      京都大学
    • Year and Date
      2008-07-03
  • [Presentation] Continuum effects for the low-lying states of drip-line oxygen isotop es2008

    • Author(s)
      月山幸志郎、大塚孝治、藤本林太郎
    • Organizer
      From Quarks to the nuclear many-body problem
    • Place of Presentation
      オスロ大学
    • Year and Date
      2008-05-21

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Published: 2010-06-11   Modified: 2016-04-21  

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