First Forbidden β-Decay Logft Values of Neutron Rich Te Isotopes

Yıl 2019, NSP2018 Özel Sayı, 45 - 51, 28.03.2019

Necla Çakmak , Muneem Abdul

Öz

Neutral tellurium detected
in three metal-poor stars enriched by products of r-process nucleosynthesis by
using near-ultraviolet spectra obtained with the Space Telescope Imaging
Spectrograph on board the Hubble Space Telescope. Tellurium (Te, Z=52) was
found at the second r-process peak (A≈130) associated with N=82 neutron shell
closure. The beta decay rates of unstable isotopes may be drastically
changed under stellar conditions. In this work, we have been investigated the
first forbidden (|∆J|=0, 1 and 2) transitions strength of some neutron rich
Tellurium isotopes. The theoretical framework is based on a proton neutron
quasiparticle random phase approximation (pn-QRPA) in the particle-hole (ph)
channel. The transition probabilities in the Woods-Saxon potential basis have
been calculated within the x-approximation.
The calculated first forbidden b-decay logft values
are in better agreement with experimental data.

Anahtar Kelimeler

First Forbidden, β-Decay, Logft

Kaynakça

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