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

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.

References in corpus (8)

• Nuclear ground-state masses and deformations: FRDM(2012)
• Superallowed 0+ to 0+ nuclear beta decays: A new survey with precision tests of the conserved vector current hypothesis and the standard model
• Shell-model half-lives for the N=82 nuclei and their implications for the r-process
• Calculation of beta-decay rates in a relativistic model with momentum-dependent self-energies
• Microscopic Calculations of Weak Interaction Rates of Nuclei in Stellar Environment for A = 18 to 100
• First-Forbidden beta decay: Medium enhancement of the axial charge at A=16
• Measurement of the Gamow-Teller Strength Distribution in 58Co via the 58Ni(t,3He) reaction at 115 MeV/nucleon
• Nuclear $\beta$-decay half-lives in the relativistic point-coupling model

Cited by in corpus (1)

• Investigation of effects of pairing correlations on calculated $\beta$-decay half-lives of fp-shell nuclei