2024/04/05 by Ha, Eunja, Cheoun, Myung-Ki, Sagawa, H. +1
#FOS: Physical sciences #Nuclear Theory (nucl-th)
paper · doi:10.48550/arxiv.2404.03884
We investigate the Gamow-Teller (GT) transition strength distributions of strongly deformed nuclei, 24,26Mg, as well as of 18O. The calculations are performed within a deformed quasi-particle random phase approximation (DQRPA) which explicitly includes the deformation degree of freedom in the Skyrme-Hartree-Fock (SHF) and RPA calculations. The residual particle-particle (p-p) interaction as well as the particle-hole (p-h) interaction are extracted from Brückner G-matrix calculations. The residual interaction dependence of the low-lying GT strength of these strongly deformed nuclei is examined by changing the strength of the residual p-p and p-h interactions. We have found that the low-lying GT peaks are quite similar in energy to those found in spherical N=Z and N=Z+2 nuclei near magic shells, but the configurations of 24,26Mg are largely mixed by the pairing correlations and the deformation. Our results are compared to the experimental GT (±) transition data by (t, 3He) and (3He, t) reactions, and found to reproduce the main features of GT strength distributions.