中国物理B ›› 2001, Vol. 10 ›› Issue (2): 117-120.doi: 10.1088/1009-1963/10/2/306

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LEVEL DENSITY AND FINITE-TEMPERATURE SPECIFIC HEAT OF NUCLEUS 104Pd UNDER MICROSCOPIC IBM

石筑一1, 桑建平2, 刘庸3   

  1. (1)Department of Physics, Guizhou Institute for Nationalities, Guiyang 550025, China; (2)Department of Physics, Wuhan University, Wuhan 430072, China; (3)Institute of Particle Physics, Huazhong Normal University, Wuhan 430079, China
  • 收稿日期:2000-03-16 修回日期:2000-07-19 出版日期:2001-02-15 发布日期:2005-06-12
  • 基金资助:
    Project supported by the Natural Science Foundation of Hubei Province, China (Grant No. 98J122).

LEVEL DENSITY AND FINITE-TEMPERATURE SPECIFIC HEAT OF NUCLEUS 104Pd UNDER MICROSCOPIC IBM

Shi Zhu-yi (石筑一)a, Liu Yong (刘庸)b, Sang Jian-ping (桑建平)c    

  1. a Department of Physics, Guizhou Institute for Nationalities, Guiyang 550025, China; b Institute of Particle Physics, Huazhong Normal University, Wuhan 430079, China; c Department of Physics, Wuhan University, Wuhan 430072, China
  • Received:2000-03-16 Revised:2000-07-19 Online:2001-02-15 Published:2005-06-12
  • Supported by:
    Project supported by the Natural Science Foundation of Hubei Province, China (Grant No. 98J122).

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摘要： By using the microscopic sdgIBM-Fmax approach, procedure of canonical ensemble average and saddle point approximation, thermodynamics of nucleus is established under microscopic IBM. Calculations of spectrum, level density and finite-temperature specific heat for the nucleus 104Pd are carried out. The calculated values are coincident with the experimental data reported recently. The results predict that the shape phase transition in ground state band appears at about T≈0.230MeV and the phase transition of thermal excitation mode takes place at T≈0.630MeV for nucleus 104Pd.

Abstract: By using the microscopic sdgIBM-Fmax approach, procedure of canonical ensemble average and saddle point approximation, thermodynamics of nucleus is established under microscopic IBM. Calculations of spectrum, level density and finite-temperature specific heat for the nucleus 104Pd are carried out. The calculated values are coincident with the experimental data reported recently. The results predict that the shape phase transition in ground state band appears at about T≈0.230MeV and the phase transition of thermal excitation mode takes place at T≈0.630MeV for nucleus 104Pd.

Key words: spectrum, level density, finite-temperature specific heat, finite-temperature phase transition, 104Pd

中图分类号:  (90 ≤ A ≤ 149)

  • 27.60.+j
21.60.Ev (Collective models) 21.60.Fw (Models based on group theory) 21.10.Pc (Single-particle levels and strength functions) 21.10.Ma (Level density) 23.20.-g (Electromagnetic transitions) 24.60.-k (Statistical theory and fluctuations)