Deformed even-even nuclei in a quark-meson coupling model with tensor coupling.

Abstract

In this work, a new quark-meson coupling model is employed to study the ground-state properties of axially deformed even-even nuclei. Two essential ingredients, namely, density dependence of quark mass and tensor coupling, play important roles in our approach. In particular, it is the first time that the deformed quark-meson coupling calculation with tensor coupling is applied to study the properties of finite nuclei. The present work involves a systematical study of nuclei ranging from Z = 50 to Z = 82. The ground-state binding energies, quadrupole deformations, shape coexistence, two-neutron separation energies and the root-mean-square charge radii are calculated and compared with the experimental data. It is shown that the ground-state properties of the deformed nuclei are reasonably well reproduced by a model based on the sub-hadronic degrees of freedom.