Evaluation nuclear level density models for 56Mn nucleus based on experimental 55Mn(n,γ)56Mn cross section.

Abstract

In this work, we have evaluated several nuclear level density (NLD) models of ⁵⁶Mn nucleus. Three phenomenological and three microscopic models are involved. In detail, they are the Gilbert-Cameron, back-shifted Fermi gas, and generalized superfluid for the phenomenological group, and Hartree-Fock-BCS, Hartree-Fock-Bogolyubov plus combinatorial method (HFBC), and the temperature-dependent HFBC for the microscopic one. NLDs computed using these models have been used as inputs for Talys 1.95 code to calculate the ⁵⁵Mn(n,γ)⁵⁶Mn reaction cross-sections. These calculated cross-sections were then compared with experimental data. The obtained results indicate that none of the involved NLD models are able to appropriately describe the experimental data throughout the whole energy range of incident neutrons (E_n), particularly when E_n = 2.7 to 10 MeV