Speaker
Description
We investigate the role of the Coulomb interaction in nuclear deformation and stability across the nuclear chart. Using self-consistent Hartree-Fock-Bogoliubov (HFB) calculations within DFT theory, we systematically evaluate quadrupole deformation for even-even nuclei with proton numbers ranging from Z=2 to Z=118.
By comparing results obtained with and without the Coulomb interaction, we find that the quadrupole deformation tend to be larger due to the Coulomb interaction. In addition, in the absence of the Coulomb interaction, nuclei tend to stabilize near the N=Z line, reflecting the isospin symmetry of the strong interaction. When the Coulomb interaction is included, this symmetry is broken, and additional neutrons are required to overcome the proton-proton repulsion. As a result, the region of stability systematically shifts toward neutron-rich region.
These results illustrate how the Coulomb interaction influences the isospin structure of finite nuclei. In particular, the deformation patterns and stability trends we observe may provide insight into how symmetry energy manifests in realistic nuclear systems through the interplay of nuclear and Coulomb forces.
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