Allowed and forbidden ?-decay log ft values of neutron-rich Pb and Bi isotopes
Küçük Resim Yok
Tarih
2024
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
The 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.
Açıklama
Anahtar Kelimeler
Weak-Interaction Rates, R-Process, Microscopic Calculations, Nuclei, Shell
Kaynak
European Physical Journal A
WoS Q Değeri
N/A
Scopus Q Değeri
Q2
Cilt
60
Sayı
3
