Neutron–proton pairing correlations and deformation for N = Z nuclei in Sd- And Pf-shell by deformed BCS and deformed QRPA

초록

We investigate neutron–proton (np) pairing correlation effect on the shell evolution of ground-state energies along with the deformation for N = Z nuclei in sd- and pf-shell, such as 24 Mg and 72 Kr. We start from a simple shell-filling model constructed by a deformed Woods–Saxon potential characterized as β 2 deformation, and then we include all kinds of pairing correlations in the residual interaction. In this work, like- and unlike-pairing correlation decomposed as isoscalar (IS) T = 0 and isovector (IV) T = 1 component are explicitly taken into account to estimate the ground-state energies. It turns out that the IS condensation can explain the oblate deformation for 72 Kr. We also test those effects on the Gamow–Teller (GT) transition for another N = Z nucleus, 56 Ni, which explicitly exhibits the effects by the IS condensation and the deformation. © 2019 Jagellonian University. All Rights Reserved.

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