Study of nuclear level density and entropy in 161,162Dy

The purpose of this study was to calculate level density of 161,162Dy isotopes in three different phenomenological models. The level density in GSM model, below the critical energy is well reproduced as well as by Bethe formula and constant temperature model, if the parameters are fitted. Thermo dynamical entropy as a function of nuclear temperature was calculated for the 161,162Dy nuclei. According to the plots based on these calculations, as we expected, 161Dy with odd mass number has greater entropy than 162Dy with even mass number. The entropy excess represents the single hole entropy