Role of T=0 pairing in Gamow-Teller states in N=Z nuclei
| Autor: | Bai, C. L., Sagawa, H., Sasano, M., Uesaka, T., Hagino, K., Zhang, H. Q., Zhang, X. Z., Xu, F. R. |
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| Rok vydání: | 2012 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1016/j.physletb.2012.12.060 |
| Popis: | 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 $^{56}$Ni can be considered as a manifestation of the role of T=0 pairing in the GT collective states. Comment: 5 pages, 3 figures |
| Databáze: | arXiv |
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