Modification of mass formula by considering isospin effects

TL;DR

This paper introduces a semi-empirical nuclear mass formula incorporating isospin effects, reducing parameters and improving accuracy, while exploring nuclear structure phenomena and shell corrections.

Contribution

It presents a new mass formula based on the macroscopic-microscopic method with reduced parameters and enhanced predictive power for nuclear masses and shell effects.

Findings

21% reduction in rms deviation to 0.516 MeV

Identification of N=16 as a new magic number in light neutron-rich nuclei

Predictions of shell corrections for super-heavy nuclei

Abstract

We propose a semi-empirical nuclear mass formula based on the macroscopic-microscopic method in which the isospin and mass dependence of model parameters are investigated with the Skyrme energy density functional. The number of model parameters is considerably reduced compared with the finite range droplet model. The rms deviation with respect to 2149 measured nuclear masses is reduced by 21%, falls to 0.516 MeV. The new magic number N=16 in light neutron-rich nuclei and the shape coexistence phenomena for some nuclei have been examined with the model. The shell corrections of super-heavy nuclei are also predicted.