Akademik Veri Yönetim Sistemi
BRAZILIAN JOURNAL OF PHYSICS, cilt.56, sa.3, 2026 (SCI-Expanded, Scopus)
The ground state properties of neutron-rich nuclei have been investigated using the Relativistic Hartree-Bogoliubov model. The density-dependent functions are utilized to compute the ground state nuclear deformation (beta(2)) and potential energy curves. Yet another set of deformations was adopted from the Finite Range Droplet Model (FRDM). We examine the effect of nuclear deformation on charge-changing transitions of selected neutron-rich nuclei. Later, the computed and adopted values of (beta(2)) were used as a free parameter in the proton-neutron quasiparticle random phase approximation (pn-QRPA) model to calculate the beta-decay properties under terrestrial and stellar conditions. It was concluded that the beta-decay properties of neutron-rich nuclei changed with change the values of nuclear deformation. The predicted beta-decay half-lives using FRDM beta(2) are 87.27% (100%) within a factor 2 (10) with measured values. The FRDM computed deformation values provided the best predictions for calculated half-lives followed by the DD-ME2 functional. The terrestrial beta-decay halflives changed up to 3 orders of magnitude and the stellar beta-rates within a factor of 2 as the neutron-rich nuclei switched their geometrical configurations. For the magic number nucleus 138Sn, the stellar rates changed substantially by more than 1 order of magnitude as the nucleus transitioned away from the spherical shape. Our investigation might prove useful for a realistic modeling of nucleosynthesis calculations.