Role of T=0 pairing in Gamow-Teller states in N=Z nuclei

C. L. Bai, H. Sagawa, M. Sasano, T. Uesaka, K. Hagino, H. Q. Zhang, X. Z. Zhang, F. R. Xu

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

Gamow-Teller (GT) states in N=Z nuclei with the mass number A from 48 to 64 are studied by using Hartree-Fock-Bogoliubov + quasi-particle random phase approximation (HFB+QRPA) with Skyrme interactions. The isoscalar spin-triplet (T=0, S=1) pairing interaction is taken into account in QRPA calculations. It is found in the context of SU(4) symmetry in the spin-isospin space that the GT strength of lower energy excitations is largely enhanced by the T=0 pairing interaction which works cooperatively with the T=1 pairing interaction in the ground state. A two-peaked structure observed recently in (p, n) reaction on 56Ni can be considered as a manifestation of the role of T=0 pairing in the GT collective states.

Original languageEnglish
Pages (from-to)116-120
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume719
Issue number1-3
DOIs
Publication statusPublished - 2013 Feb 12

Keywords

  • Gamow-Teller states
  • SU(4) supermultiplet
  • T=0 pairing interaction

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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