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arXiv · 2503.17250

Investigation of pairing correlations on computed Gamow-Teller strength distributions and associated $\beta$-decay half-lives

Jameel-Un Nabi·Asim Ullah·Muhammad Tahir
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Abstract

We investigate the effect of pairing correlations on the computed Gamow-Teller (GT) strength distributions and corresponding $\beta$-decay half-lives. The calculations are performed for a total of 47 sd-shell nuclei, for $20 < A < 30$, employing the pn-QRPA model. Our calculations use three different values of pairing gaps computed using three different empirical formulae. The GT strength distribution and centroid values change considerably with a change in the pairing gap values. This, in turn, leads to differences in computed half-lives. The pairing gaps computed using the mass-dependent formula result in the calculated half-lives being in better agreement with the measured data.

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Jameel-Un Nabi, Asim Ullah, Muhammad Tahir. 2025-03-21. Investigation of pairing correlations on computed Gamow-Teller strength distributions and associated $\beta$-decay half-lives. https://doi.org/10.1016/j.newast.2022.101781

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