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中性子ハロー核におけるテンソル相関の性質

Research Project

Project/Area Number 06J08665
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeSingle-year Grants
Section国内
Research Field Particle/Nuclear/Cosmic ray/Astro physics
Research InstitutionOsaka University

Principal Investigator

明 孝之  Osaka University, 核物理研究センター, 特別研究員(PD)

Project Period (FY) 2006 – 2007
Project Status Completed (Fiscal Year 2007)
Budget Amount *help
¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 2007: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2006: ¥1,200,000 (Direct Cost: ¥1,200,000)
Keywords核力 / 中性子ハロー構造 / 核構造
Research Abstract

本年度は軽い原子核におけるテンソル相関の性質を調べた。研究成果は主に以下の2点である。
1.中性子ハロー核におけるテンソル相関の役割
本研究では、中性子ハロー構造を呈する^<11>Liとその周辺の原子核(^9Li,^<10>Li)におけるテンソル相関の役割を系統的に調べた。特に^<11>Liでは中性子の魔法数8が消滅しており、従来の核構造の知識では理解できなかった。これに対して我々は、従来まで繰り込む形式で取り扱われてきたテンソルカの効果を、あらわに扱うことで魔法数の破れを初めて自然に説明した。同時にLi同位体について、これまで観測されている様々な物理量について、高い再現性を示した。
2.テンソル相関と短距離相関を記述する核模型の構築
本研究では、前年度、核力の重要な要素であるテンソルカを核構造に顕わに記述する手法を開発し、その成功を示してきた。我々はその手法をテンソル最適化殻模型(Tensor-optimized shell mode; TOSM)と呼んだ。本年度は、核力が持つもう1つの重要な相関である短距離斥力芯の効果を核構造に考慮した。手法にはユニタリー相関演算子法(Unitary Correlation Operator Method; UCOM)を用いた。TOSMとUCOMを組み合わせることにより、自由空間の核力から出発した、第一原理計算が可能になる。実際の計算結果では、原子核の厳密解に対して、テンソル相関と短距離相関の両者を考慮することにより、非常に高い再現性を示すことができた。

Report

(2 results)
  • 2007 Annual Research Report
  • 2006 Annual Research Report
  • Research Products

    (15 results)

All 2007 2006

All Journal Article (10 results) (of which Peer Reviewed: 2 results) Presentation (5 results)

  • [Journal Article] Roles of the tensor and pairing correlations on the halo formation in 11Li2007

    • Author(s)
      Takayuki Myo, Kiyoshi Kato, Hiroshi Toki and Kiyomi Ikeda
    • Journal Title

      Physical Review C 76

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Resonances of 7He using the complex scaling method2007

    • Author(s)
      Takayuki Myo, Kiyoshi Kato and Kiyomi Ikeda
    • Journal Title

      Physical Review C 76

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Properties of the tensor correlation in neutron halo nuclei2007

    • Author(s)
      Takayuki Myo, Kiyoshi Kato, Hiroshi Toki and Kiyomi Ikeda
    • Journal Title

      Nuclear Physics A 790

      Pages: 311-314

    • Related Report
      2007 Annual Research Report
  • [Journal Article] Role of the tensor correlation on the spin-orbit splitting in neutron halo nuclei2007

    • Author(s)
      Takayuki Myo, Kiyoshi Kato, Hiroshi Toki and Kiyomi Ikeda
    • Journal Title

      AIP Conference Proceeding 915

      Pages: 823-828

    • Related Report
      2007 Annual Research Report
  • [Journal Article] Tensor correlation in 4^He with the tensor-optimized shell model2007

    • Author(s)
      Takayuki Myo, Satoru Sugimoto, Kiyoshi Kato, Hiroshi Toki, Kiyomi Ikeda
    • Journal Title

      Progress of Theoretical Physics 117

      Pages: 257-274

    • Related Report
      2006 Annual Research Report
  • [Journal Article] The Complex Scaling Method for Many-Body Resonances and Its Applications to Three-Body Resonances2006

    • Author(s)
      Shigeyoshi Aoyama, Takayuki Myo, Kiyoshi Kato, Kiyomi Ikeda
    • Journal Title

      Progress of Theoretical Physics 116

      Pages: 1-35

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Coulomb breakup and pairing excitation of the two-neutron halo nucleus <11>^Li2006

    • Author(s)
      Shigeyoshi Aoyama, Takayuki Myo, Kiyoshi Kato, Kiyomi Ikeda
    • Journal Title

      Physica Scripta T125

      Pages: 100-102

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Properties of the tensor correlation in He isotopes2006

    • Author(s)
      Takayuki Myo, Satoru Sugimoto, Kiyoshi Kato, Hiroshi Toki, Kiyomi Ikeda
    • Journal Title

      Journal of Physics : Conference Series 49

      Pages: 174-175

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Extended three-body analysis of <11>^Li with tensor and pairing correlations2006

    • Author(s)
      Takayuki Myo, Kiyoshi Kato, Hiroshi Toki, Kiyomi Ikeda
    • Journal Title

      Special issue of Modern Physics Letters A21

      Pages: 2491-2498

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Role of the tensor correlations in 4^He and 5^He2006

    • Author(s)
      Kiyomi Ikeda, Takayuki Myo, Satoru Sugimoto, Kiyoshi Kato, Hiroshi Toki
    • Journal Title

      Special issue of Modern Physics Letters A21

      Pages: 2483-2490

    • Related Report
      2006 Annual Research Report
  • [Presentation] Role of the tensor correlation in neutron halo nuclei2007

    • Author(s)
      明孝之
    • Organizer
      INT program on Nuclear Many-Body Approaches for the 21st Century
    • Place of Presentation
      University of Washington, Seattle, USA
    • Year and Date
      2007-11-26
    • Related Report
      2007 Annual Research Report
  • [Presentation] A systematic study of the tensor correlation in He and Li isotopes2007

    • Author(s)
      明孝之
    • Organizer
      Chiral Symmetry in Hadron and Nuclear Physics
    • Place of Presentation
      大阪大学
    • Year and Date
      2007-11-14
    • Related Report
      2007 Annual Research Report
  • [Presentation] Tensor-optimized shell modelにおけるユニタリー相関演算子法を用いた短距離相関の記述2007

    • Author(s)
      明孝之
    • Organizer
      日本物理学会第62回年次大会
    • Place of Presentation
      北海道大学
    • Year and Date
      2007-09-21
    • Related Report
      2007 Annual Research Report
  • [Presentation] Role of the explicit tensor correlation in neutron halo nuclei2007

    • Author(s)
      明孝之
    • Organizer
      The International Nuclear Physics Conference
    • Place of Presentation
      国際フォーラム、東京
    • Year and Date
      2007-06-04
    • Related Report
      2007 Annual Research Report
  • [Presentation] Roles of the tensor and pairing correlations in neutron halo nuclei2007

    • Author(s)
      明孝之
    • Organizer
      The ECT* workshop on many-body open quantum systems
    • Place of Presentation
      トレント、イタリア
    • Year and Date
      2007-05-18
    • Related Report
      2007 Annual Research Report

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Published: 2006-04-01   Modified: 2024-03-26  

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