LEVEL DENSITY AND LEVEL DENSITY PARAMETER IN MEDIUM-HEAVY NUCLEI INCLUDING THERMAL AND QUANTAL FLUCTUATION EFFECTS

In a realistic application of the SPA + RPA theory for calculation of the nuclear level densities we find that quantal fluctuation correctio ns (RPA) are important even up to temperature T = 2.0 MeV. This leads to a good agreement between calculated numbers and the available exper imental data for Pd-104 and Sn-114, particularly the excitation energy (E) dependence. Furthermore, we also argue that a = S-2/4E* is the o nly correct definition of the level density parameter in the present c ontext which is also consistent with the Bethe like level density form ula. (C) 1998 Elsevier Science B.V.