摘要
By using the microscopic sdIBM-2 formalism, procedures of canonical ensemble average and saddle point method, the finite-temperature internal energy, specific heat and level density of nucleus were calculated. The temperature of the phase transition of thermal excitation mode was determined in reference to the single boson energy. As there is a peak in the specific heat, it is established that the symmetric phase transition takes place in the nucleus. For 56’58Fe isotopes, numerical results were calculated and compared with the experimental data and the values obtained by quantum Monte Carlo calculations. The present results indicate that this approach can be successfully used in describing light nuclei and their finite-temperature behavior.
By using the microscopic sdIBM-2 formalism, procedures of canonical ensemble average and saddle point method, the finite-temperature internal energy, specific heat and level density of nucleus were calculated. The temperature of the phase transition of thermal excitation mode was determined in reference to the single boson energy. As there is a peak in the specific heat, it is established that the symmetric phase transition takes place in the nucleus. For 56'58Fe isotopes, numerical results were calculated and compared with the experimental data and the values obtained by quantum Monte Carlo calculations. The present results indicate that this approach can be successfully used in describing light nuclei and their finite-temperature behavior.
基金
the Natural Science Foundation of Guizhou Province(973067) and the Educatioll Committee of Guizhou Province ([20001518)
关键词
热力学相变
微观IBM
热力学性质
铁原子核
Microscopic sdIBM-2, Thermodynamical phase transition, 56,58Fe nuclear structure
