$\beta$-Decay Properties of Neutron-rich Yttrium Isotopes

Abstract

In this study, we have reported key nuclear properties of weak $\beta$-decay processes on Yttrium isotopes for the mass number range $A=101-108$. This mass region is important in astrophysical $r$-process abundances. Our study might be helpful in $r$-process simulations. We have computed charge-changing strength distributions, $\beta$-decay half-lives, $\beta$-delayed neutron emission probabilities, and ${\beta }^{-}$ (EC) weak rates under stellar conditions. We have performed microscopic calculations based on deformed proton-neutron quasi-particle random phase approximation (pn-QRPA) over a wide temperature ($10^7-3\times 10^{10}$) K and density ($10-10^{11}$) g/cm${}^3$ domain. Unique first-forbidden (U1F) transitions have been included in the calculations in addition to the allowed transitions. A significant decrease in calculated half-lives in certain cases, e.g., in ${}^{107}$Y (${}^{108}$Y) by about 67\% (42\%), has been observed because of the contribution from U1F transitions. We have compared present results with measured and theoretical works. A good agreement of our half-lives with experimental data is observed.

arXiv comment16 Pages, 6 Tables, 1 Figures

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Cited by in corpus (2)

• Impact of the Brink Axel Hypothesis on Unique First Forbidden \b{eta} transitions for r process nuclei
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