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Interaction dependence of the nuclear level density calculated using Hartree-Fock-Bogoliubov theory

Furutachi, Naoya; Minato, Futoshi; Iwamoto, Osamu

While Fermi Gas type phenomenological models are widely used to calculate the nuclear level density (NLD) of stable nuclei, it is important to develop a microscopic method to achieve reliable NLD for unstable nuclei. One of microscopic methods to calculate NLD is that based on the microscopic nuclear structure calculation using Hartree-Fock-Bogoliubov (HFB) theory. Since a effective nuclear interaction is basically the only input in HFB calculation, we investigated how the calculated NLD depends on it with special attention to the adopted pairing interaction, to discuss about the reliability of this method. Adding to SkM* force that was used in our previous study, SLy4, SkP, and UNEDF1 forces were used in HFB calculations of the present study. The statistical method was applied to derive NLD based on HFB calculation. We compared the s-wave resonance spacing D$$_0$$ derived from the calculated NLD with the experiments, and found better agreement with the results with SkP and UNEDF1 forces compared to those with SkM and SLy4 forces.

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