Re-analysis of the Gamow-Teller distributions for N=Z nuclei, 24Mg, 28Si, and 32S

Abstract

The Gamow-Teller (GT) strength distributions of sd shell N=Z nuclei (${}^{24}$Mg, ${}^{28}$Si, and ${}^{32}$S) are investigated within the framework of proton-neutron quasi particle random phase approximation (pn QRPA) using a deformed basis. The nuclear properties of these special nuclei were investigated by the Relativistic Mean Field (RMF) model. The RMF framework with density-dependent interactions (DD-PC1 and DD-ME2) was employed to compute ground-state deformation parameters (beta 2) using potential energy curves. The ${\beta }_2$ values computed from the RMF and the finite range droplet model (FRDM) were employed as a free parameter in the pn QRPA calculation to investigate the resulting GT strength distributions.The present model-based analyses compare well with the observed data.

Comments: 14 pages 1 table 4 figures