Level density and finite-temperature specific heat of nucleus Pd-104 undermicroscopic IBM

By using the microscopic sdgIBM-F-max approach, the procedure of canonical ensemble average and the saddle point approximation, the thermodynamics of the nucleus is established under microscopic IBM. Calculations of spectrum, level density and finite-temperature specific heat for the nucleus Pd-104 are carried out. The calculated values are coincident with the experimental data reported recently. The results predict that the shape phase transitio n in the groundstate band appears at about T approximate to 0.230 MeV and t he phase transition of the thermal excitation mode takes place at T approxi mate to 0.630 MeV for the nucleus Pd-104.