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 corrections (RPA) are important even up to temperature T=2.0 MeV. This leads to a good agreement between calculated numbers and the available experimental data for 104Pd and 114Sn, particularly the excitation energy (E∗) dependence. Furthermore, we also argue that a=S2/4E∗ 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.