Speaker
Description
Radiative capture and stellar weak rates are important for the nucleosynthesis of low, intermediate, and heavy mass nuclei. The fundamentals of our work are to analyze the radiative capture of the neutron, proton, and heavy mass projectile by the target nuclei within the framework of the potential model, R-matrix approach, or statistical framework. We aim to analyze the resonant, non-resonant capture cross-section, reaction rates, and destructive half-lives for the list of astrophysical nuclei involved in the p-. s- or r-processes of nucleosynthesis.
Our study covers the nuclear ground state properties via the potential model for low-mass nuclei and the relativistic mean field (RMF) framework for heavy-mass nuclei. The nuclear ground state properties include nuclear radii; neutron skin thickness, neutron and proton separation energies, analysis of the nuclear deformation, nuclear shape evolution, and shape transition. Along with this, we employed a proton-neutron quasi-particles random phase approximation model (pn-QRPA) to study the impact of the nuclear shapes on the stellar beta decay rates for the list of astrophysical important nuclei.
In some environments the beta decay rates and the proton or neutron capture rates are the same at a certain temperature therefore, we aim to determine the temperature at which both rates are separate from each other or the competition of radiative capture and beta decay rates. Furthermore, we aim to calculate the effective thermal transition rates between the ground and isomeric states along with estimates of their thermal decay-decay rates in a suite of nucleosynthesis computations to assess the consequences of the isomer on isotopic abundances.
