On the Nuclear Structure and Stellar Weak Rates of Neutron-Rich ¹⁰⁴ˉ¹¹⁶Rh Isotopes
Abstract
The nuclear ground state and beta decay properties of neutron-rich odd-odd and odd-A 104−116Rh isotopes are studied by utilizing the relativistic mean-field (RMF) and proton-neutron quasi-particle random phase approximation (pn-QRPA) models. Potential energy surfaces and potential energy curves are examined to investigate the nuclear deformations, nuclear stability, and shape phase transitions. The Gamow-Teller (GT) strength distributions and β-decay properties are obtained based on a deformed pn-QRPA framework. The computed half-lives and log ft values are in good agreement with existing experimental data, supporting the utilization of nuclear models. Additionally, stellar weak interaction rates are calculated as a function of density and temperature, emphasizing their influence on nucleosynthesis in astrophysical environments. For neutron-rich Rh isotopes, the results provide useful nuclear structural data and reliable inputs for the r-process modeling.
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