v 1 2 5 D ec 1 99 7 Level density and level density parameter in medium heavy nuclei including thermal and quantal fluctuation effects

Level density and level density parameter in medium heavy nuclei including thermal and quantal fluctuation effects Abstract In a realistic application of the SPA + RPA theory for calculation of the nuclear level densities we find that quantal fluctuation corrections (RPA) are important even up to temperature T = 2.0 M eV. This leads to a good agreement between calculated numbers and the available experimental data for 104 P d and 114 Sn, particularly the excitation energy (E *) dependence. Furthermore, we also argue that a = S 2 /4E * is the only correct definition of the level density parameter in the present context which is also consistent with the Bethe like level density formula.