Cakmak, NeclaNabi, Jameel-UnMehmood, ArslanUllah, AsimTahir, Rubba2024-09-292024-09-2920241434-60011434-601Xhttps://doi.org/10.1140/epja/s10050-024-01298-3https://hdl.handle.net/20.500.14619/6321The beta-decay log ft values for Pb210-215 -> Bi210-215 and Bi210-215 -> Po210-215 transitions in the north-east region of Pb-208 nuclei are estimated using the proton-neutron quasiparticle random phase approximation (pn-QRPA) model. The pn-QRPA equations were solved using the schematic model approach. The Woods-Saxon (WS) potential was inserted as a mean-field basis and nuclei were treated as spherical. Allowed Gamow-Teller (GT) and first-forbidden (FF) transitions were investigated in the particle-hole (ph) channel. The calculated log ft values of the allowed GT and FF transitions using the pn-QRPA model with WS potential were found closer to the experimental values. Later we performed calculation of beta-decay rates in stellar environment. Here we solved the random phase approximation (RPA) equations in deformed Nilsson basis, both in the particle-particle (pp) and particle-hole (ph) channels. Allowed beta-decay and unique first-forbidden (U1F) rates were calculated in stellar matter. For certain cases, the calculated U1F contribution was much more than the allowed beta-decay rates under prevailing stellar conditions, in line with previous findings. Increasing temperature of the stellar core affected the allowed GT rates more than the U1F rates.eninfo:eu-repo/semantics/closedAccessWeak-Interaction RatesR-ProcessMicroscopic CalculationsNucleiShellArticle10.1140/epja/s10050-024-01298-32-s2.0-851895291973Q260WOS:001195442000002N/A