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Elementary Excitation Modes Built on Superdeformed High-Spin States

Research Project

Project/Area Number 01540245
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 核・宇宙線・素粒子
Research InstitutionKyoto University

Principal Investigator

MATSUYANAGI Kenichi  Kyoto Univ. Fac. of Science, Associate Professor, 理学部, 助教授 (70025451)

Project Period (FY) 1989 – 1990
Project Status Completed (Fiscal Year 1990)
Budget Amount *help
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1990: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1989: ¥1,200,000 (Direct Cost: ¥1,200,000)
KeywordsSuperdeformed rotation band / High-Spin State / Yrast Spectroscopy / Octupole Vibration / Cranking Model / Pairing Correlation / Particle-Vibration Coupling / Decoupling Factor / 超変形状態 / 巨大共鳴 / 回転バンド / 核構造
Research Abstract

We have constructed a computer program that can find all solutions of the RPA equations for elementary excitation modes built on superdeformed high-spin states. Using this computer program, we have systematically investigated properties of multipole vibrations, both isoscalar and isovector types, which could be created on superdeformed rotation bands.
The most important conclusion of this research is the theoretical prediction that the superdeformed nuclei with axis ratio 2 : 1 could be quite soft against the octupole deformations with the symmetry Y30, Y31 and Y32. Thus, existence of new types of soft vibrational modes having such symmetries are suggested, and the possibility of observing electric dipole transitions associated with them by means of the next generation of gamma-ray detector system has been discussed. The microscopic structure of these new modes and their change in character associated with the increase of the angular momentum of the rotational motion have been investigated in detail.

Report

(3 results)
  • 1990 Annual Research Report   Final Research Report Summary
  • 1989 Annual Research Report
  • Research Products

    (16 results)

All Other

All Publications (16 results)

  • [Publications] Shoujirou Mizutori: "Octupole Vibration Built on Superdeformed Rotational Bands" Progress of Theoretical Physics. 83. 666-670 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Takahiro Fukui: "Diabatic Approach to Shape Coexistence Phenomena in SemiーMagic Nuclei.IーIllustration of Basic Ideasー" Progress of Theoretical Physics. 85. (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Shoujirou Mizutori: "Octupole Vibrations with K=1 and 2 in Superconducting,Superdeformed Nuclei" Progress of Theoretical Physics. 85. (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Shojirou Mizutori: "Soft octupole Vibrations with K=0 and K≠0 Built on Superdeformed Rotation Bands and Static Pairing Correlations" Progress of Theoretical Physics.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Shoujirou Mizutori: "Collective Vibrations Built on superdeformed HighーSpin States" in“Nuclear Collective Motion and Nuclear Reaction Dynamics",ed.KーI Kuboworld Scientific et al,. 119-132 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Shoujirou Mizutori, Yoshifumi R. Shimizu and Kenichi Matsuyanagi: "Octupole Vibrations Built on Superdeformed Rotation Bands" Prog. Theor. Phys.83. 666-670 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Shoujirou Mizutori, Yoshifumi R. Shimizu and Kenichi Matsuyanagi: "Collective Vibrations Built on Superdeformed High-Spin States" "Nuclear Collective Motion and Nuclear Reaction Dynamics", edited by K-I. Kubo, M. Ichimura, M. Ishihara and S. Yamaji. World Scientific. 119 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Takahiro Fukui, Masayuki Matsuo and Kenichi Matsuyanagi: "Diabatic Approach to Shape Coexistence Phenomena in Semi-Magic Nuclei. I-Illustration of Basic Ideas-" Kyoto University Preprint. KUNS 1024. (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Shoujirou Mizutori, Yoshifumi R. Shimizu and Kenichi Matsuyanagi: "Octupole Vibrations with K=1 and 2 in Superconducting, Superdeformed Nuclei" Kyoto University Preprint. KUNS 1046. (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Shoujirou Mizutori, Yoshifumi R. Shimizu and Kenichi Matsuyanagi: "Soft Octupole Vibrations with K=0 and K*0 Built on Superdeformed Rotation Bands and Static Pairing Correlations" Kyoto University Preprint. KUNS 1057. (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Shoujirou Mizutori: "Octupole Vibrations Built on Superdeformed Rotational Bands" Progress of Theoretical Physics. 83. 666-670 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Takahiro Fukui: "Diabatic Approach to Shape Coexistence Phenomena in SemiーMagic Nuclei.IーIllustration of Basic Ideasー" Progress of Theoretical Physics. 85. (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] Shoujirou Mizutori: "Octupole Vibrations with K=1 and 2 in Superconducting,Superdeformed Nuclei" Progress of Theoretical Physics. 85. (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] Shoujirou Mizutori: "Soft Octupole Vibrations with K=0 and K≠0 Built on Superdeformed Rotation Bands and Static Pairing Correlations" Progress of Theoretical Physics.

    • Related Report
      1990 Annual Research Report
  • [Publications] Shoujirou Mizutori: "Collective Vibrations Built on Superdeformed HighーSpin States" in “Nuclear Collective Motion and Nuclear Reaction Dynamics",ed.KーI Kubo et al(World Scientific). 119-132 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Shoujiro Mizutori: "Octupole Vibrations Built on Superdeformed Rotational Bands" Progress of Theoretical Physics. 83. No.4(4 ) (1990)

    • Related Report
      1989 Annual Research Report

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Published: 1989-04-01   Modified: 2016-04-21  

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