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Study of the Extreme States with High Excitation Energy and High Spin by Ge-Si Crystal Ball.

Research Project

Project/Area Number 02452027
Research Category

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

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

Principal Investigator

MORINOBU Shunpei (1991)  Kyushu Univ., Fac. Sci., Professor, 理学部, 教授 (50016078)

黒柳 登喜大 (1990)  九州大学, 理学部, 教授 (70037159)

Co-Investigator(Kenkyū-buntansha) INOUE Hikaru  Hiroshima Univ., Fac., Sci., Associate Prof., 理学部, 助教授 (30028170)
MITARAI Shiro  Kyushu Univ., Fac., Sci., Assistant, 理学部, 助手 (00108648)
Project Period (FY) 1990 – 1991
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥7,400,000 (Direct Cost: ¥7,400,000)
Fiscal Year 1991: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1990: ¥7,100,000 (Direct Cost: ¥7,100,000)
KeywordsNuclear Structure / Nuclear Deformation / Multiplicity of Charged Particle / Rotational Band of Nucleus / Crystal Ball / In-beam Spectroscopy / Fusion Reaction Induced by Heavy Ion / Silicon Ball / γ線多重度
Research Abstract

In the early stage of this project, a silicon detector array (Si Ball) which had proved to be quite powerful in the identifications and selections of the reaction channels in heavy ion fusion reaction was improved to stand the high duty use at high beam currents.
The combined system of NORDBALL and the improved Si Ball brought about a dramatic progress in the spectroscopic studies of the new deformed region of A=80 90. As a result, new level structures of nucleides of ^<87>Mo, ^<87>Nb, ^<85>Nb, ^<82>Y, ^<81>Y, ^<82>Zr and ^<82>Sr including highly excited states have been established and the analysis for the nuclear properties have been carried out. The deformation of nuclei in this region grows with the nucleon number toward Z and N = 40. The isotones of N = 46 were found to lie the border between spherical and deformed nucleus regions, and the nuclei of N=45 and 46 seem to be strongly deformed at highly excited high-spin states. These experimental results have been compared with the results of cranking model calculation.
Besides the above mentioned studies in Japan-NBI collaboration, lots of experiments have been carried out at the tandem accelerator laboratory of Kyushu University to clarify the properties of low-lying and ground states of the nuclei in the A = 80 -90 region. The fruitful outputs including a systematic discovery of new isotopes not only gave complementary information for the high spin states at high excitation but also led to the development of a new effective method of collecting thorough spectroscopic knowledge of these nuclei.

Report

(3 results)
  • 1991 Annual Research Report   Final Research Report Summary
  • 1990 Annual Research Report
  • Research Products

    (71 results)

All Other

All Publications (71 results)

  • [Publications] S.E.Arnell: "The NORDBALL System Adopted for Spectroscopy of Nuclei Far from Stability" Cotributed paper of the International Conference on Nuclear Physics in Ninrties,Ork Ridge. 214 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 御手洗 志郎: "GammaーRay Measurement by Crystal Ball in Mass=80 Region" JAERIーM(日本原子力研究所). 72. 22 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 井上 光: "Experimental Studies of High Spin States of Nuclei by Coulomb Excitation and Measurements of inーbeam γ rays" KURRIーTR(京都大学原子炉実験所). 333. 43 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 閔 丙珠: "The Level Structure of 87ーNb" Nucl.Phys.A530. 211-231 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 黒柳 登喜大: "The Band Structure of 82ーSr" 原子核研究. 35. 51-58 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 御手洗 志郎: "Inーbeam Measurement by NOR DBALL,Inner Ball,Neutron Wall and Si Ball" 原子核研究. 35. 211-221 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] B.Cederwall: "HgihーSpin States in 121ーBa and Deformed Dependent Alignments" Nucl.Phys.A529. 410-428 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 黒柳 登喜大: "Multiplicity Measurement of Charged Particles Emitted in Nuclear Reaction" 原子核研究. 36. 153-165 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 小田原 厚子: "The β Decay of the New lsotope 88ーTc" KURRIーTR(京都大学原子炉実験所). 348. 68-73 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 御手洗 志郎: "Si Ball of New Type" KURRIーTR(京都大学原子炉実験所). 348. 65-67 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] B.Cederwall: "High Spin States of 120-Ba" Z.Phys.A-Hadrons and Nuclei. 338. 461-462 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] B.Cederwall: "Neutron and Proton hll/2.Alignment effects in 121-La" Z.Phys.A-Hadrons and Nuclei. 338. 463-464 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] S.Juutinen: "Evidence for Band Termination in 118-Xe" Z.Phys.A-Hadrons and Nuclei. 338. 365-366 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 平口 和彦: "Half Lives and Qーβ Measurements for new nuclei of 89ーTc and 89mーTc" Z.Phys.AーHadrons and Nuclei. 338. 7-10 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 外村 浩美: "インビ-ム核分光で使っているデ-タ収集系とデ-タ解析プログラムー九大タンデムー" 理研シンポジウム「重イオンビ-ムによる核分光」報告集. 2-23 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 御手洗 志郎: "インビ-ム核分光実験の現状ーNBI共同実験2ー" 理研シンポジウム「重イオンによる核分光」. 126-143 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 向 淳子: "The β Decay of the New Isotope 79ーY" Z.Phys.AーHadrons and Nuclei. (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 黒柳 登喜大: "Rotational Band of 82ーZr," Z.Phys.AーHadrons and Nuclei.(1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 靜間 俊行: "Search of New Isotope 86ーMo" KURRIーTR. (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 黒柳 登喜大: "The Silicon Ball:A 4π Si Detector Array for Reaction Channel Selection" Nuclear Instruments and Methods. (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 御手洗 志郎: "Level Structure of 81ーY" 原子核研究. (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] S. E. Arnell: "The NORDBALL System Adopted for Spectroscopy of Nuclei Far from Stability" Contributed paper of the Inter. Conf. on Nucl. Phys. in Nineties, Oak Ridge. 214 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] S. Mitarai: "Gamma-Ray Measurement by Crystal Ball in Mass=80 Region" JAERI-M. 72. 22 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] H. Inoue: "Experimental Studies of High Spin States of Nuclei by Coulomb Excitation and Measurements of in-beam lambda rays" KURRI-TR. 333. 13-18 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] B. J. Min: "The Level Structure of 87-Nb" Nucl. Phys.A530. 211-231 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] T. Kuroyanagi: "The Band Structure of 82-Sr" Genshikaku Kenkyu. 35. 51-58 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] S. Mitarai: "In-beam Measurement by NORDBALL, Inner Ball, Neutron Wall and Si Ball" Genshikaku Kenkyu. 35. 211-221 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] B. Cederwall: "High-Spin States in 121-Ba and Deformed Dependent Alignments" Nucl. Phys.A529. 410-428 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] T. Kuroyanagi: "Multiplicity Measurement of Charged Particles Emitted in Nuclear Reaction" Genshikaku Kenkyu. 36. 153-165 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] A. Odahara: "The beta Decay of the New Isotope 88-Tc" KURRI-TR. 349. 68-73 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] S. Mitarai: "Si Ball of New Type" Kurri-Tr. 348. 65-67 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] B. Cederwall: "High Spin States of 120-Ba" Z. Phys. A-Hadrons and Nuclei. 338. 461-462 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] B. Cederwall: "Neutron and Proton h11/2 Alignment effects in 121-La" Z. Phys. A-Hadrons and Nuclei. 338. 463-464 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] S. Juutinen: "Evidence for Band Termination in 118-Xe" Z. Phys. A-Hadrons and Nuclei. 338. 365-366 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] K. Heiguchi: "Half Lives and Q-beta Measurements for new nuclei of 89-Tc and 89m-Tc" Z. Phys. A-Hadrons and Nuclei. 338. 7-10 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] H. Tomura: "Data Acquisition and Analysis System on Nuclear Spectroscopy in Kyushu University" Proc. RIKEN Sym. Nucl. Spect. Neans. Heavy Ion Reac. Inst. Phys. Chem. Resea.Aug.2-23 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] S. Mitarai: "NBI Collaboration 2 (Kyushu Univ. Group on Nuclear Experiment)" Proc. RIKEN Sympo. Nucl. Spect. Neans. Heavy Ion Reac. Inst. Phys. Chem. Resea.Aug.126 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] J. Mukai: "The betaDacay of the New Isotope 79-Y" Z. Phys. A-Hadrons and Nuclei. (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] T. Kuroyanagi: "Rotational Band of 82-Zr" Z. Phys. A-Hadrons and Nuclei. (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] T. Shizuma: "Search of New Isotope 86-Mo" KURPI-TR. (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] T. Kuroyanagi: "The Silicon Ball : A 4pi Si Detector Array for Reaction Channel Selection" Nucl. Instr. and Meth.(1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] S. Mitarai: "Level Structure of 81-Y" Genshikaku Kenkyu. (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 閔 丙珠: "The Level Structure of 87ーNb" Nuclear Physics. A530. 211-231 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 黒柳 登喜大: "The Band Structure of 82ーSr" 原子核研究. 35. 51-58 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 御手洗 志郎: "Inーbeam Measurement by NORDBALL,Inner Ball,Neutron Wall and Si Ball" 原子核研究. 35. 211-221 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] B.Cederwall: "HgihーSpin States in 121ーBa and Deformed Dependent Alignments" Nuclear Physics. A529. 410-428 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 黒柳 登喜大: "Multiplicity Measurement of Charged Particles Emitted in Nuclear Reaction" 原子核研究. 36. 153-165 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 小田原 厚子: "The βDecay of the New Isotope 88ーTc" KURRIーTR(京都大学原子炉実験所). 348. 68-73 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 御手洗 志郎: "Si Ball of New Type" KURRIーTR(京都大学原子炉実験所). 348. 65-67 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] B.Cederwall: "High Spin States of 120ーBa" Z.Phys.AーHadrons and Nuclei. 338. 461-462 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] B.Cederwall: "Neutron and Proton h11/2 Alignment effects in 121ーLa" Z.Phys.AーHadrons and Nuclei. 338. 463-464 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] S.Juutinen: "Evidence for Band Termination in 118ーXe" Z.Phys.AーHadrons and Nuclei. 338. 365-366 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 平口 和彦: "Half Lives and Qーβ Measurements for new nuclei of 89ーTc and 89mーTc" Z.Phys.AーHadrons and Nuclei. 338. 7-10 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 外村 浩美: "インビ-ム核分光で使っているデ-タ収集系とデ-タ解析プログラムー九大タンデムー" 理研シンポジウム「重インオビ-ムによる核分光」報告集. 2-23 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 御手洗 志郎: "インビ-ム核分光実験の現状ーNBI共同実験2ー" 理研シンポジウム「重イオンビ-ムによる核分光」報告集. 126-143 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 向 淳子: "The βDecay of the New Isotope 79ーY" Z.Phys.AーHadrons and Nuclei. (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] 黒柳 登喜大: "Rotational Band of 82ーZr" Z.Phys.AーHadrons and Nuclei.(1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] 靜間 俊行: "Search of New Isotope 86ーMo" KURRIーTR. (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] 黒柳 登喜大: "The Silicon Ball:A 4π Si Detector Array for Reaction Channel Selection" Nuclear Instruments and Methods. (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] 御手洗 志郎: "Level Structure of 81ーY" 原子核研究. (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] 御手洗 志郎: "Gamma Ray Measurements by Crystal Ball in the Mass=80 Region" JAERIーM(日本原子力研究所). 90ー072. 22 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 御手洗 志郎: "Evidence for strongly Deformed Nucleaf Shopes in the A=80 Mass Region" 8th General Conference of the European Physical Sociality,Amsterdam. (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 井上 光: "Experimental Studies of High Spin States of Nuclei by Coulomb Excitation and Measurements of Inーbeam γ Rays" KURRIーTR (京都大学原子炉実験所). 333. 43 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 閔 丙珠: "The level strudture of ^<87>Mb" Nuclear Physics A. (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] S.E.Arnell: "The NORDBALL System Adopted for Spectroscopy of Nuclei far from Strability" Contribution to Conference “Nuclear Physics in Ninties"(Oak Ridge,Tenessee). 214 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 黒柳 登喜大: "The band structure of ^<82>Sr" 原子核研究. (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] 御手洗 志郎: "Inーbeam Measurement by NORDBALL,Inner Ball,Neutron Wall and Si Ball" 原子核研究. (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] B.Cederwall: "High Spin States in ^<121>Ba and Deformation Dependent Alignment" Nuclear Physics A. (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] S.Juutines: "Exidence for Band Termination in ^<118> xe" Zeitschrift. (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] B.Cederwell: "Neutron and Proton h_<11/2> Alignment Effect in ^<121>La" Zeitschrift. (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] B.Cederwell: "High Spin Atates of ^<120>Ba" Zeitschrift. (1991)

    • Related Report
      1990 Annual Research Report

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Published: 1990-04-01   Modified: 2016-04-21  

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