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

doi:10.1016/j.physletb.2012.12.060

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

SCI - Physics

Research output: Contribution to journal › Article › peer-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 language	English
Pages (from-to)	116-120
Number of pages	5
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	719
Issue number	1-3
DOIs	https://doi.org/10.1016/j.physletb.2012.12.060
Publication status	Published - 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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title = "Role of T=0 pairing in Gamow-Teller states in N=Z nuclei",

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.",

keywords = "Gamow-Teller states, SU(4) supermultiplet, T=0 pairing interaction",

author = "Bai, {C. L.} and H. Sagawa and M. Sasano and T. Uesaka and K. Hagino and Zhang, {H. Q.} and Zhang, {X. Z.} and Xu, {F. R.}",

year = "2013",

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doi = "10.1016/j.physletb.2012.12.060",

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AU - Bai, C. L.

AU - Sagawa, H.

AU - Sasano, M.

AU - Uesaka, T.

AU - Hagino, K.

AU - Zhang, H. Q.

AU - Zhang, X. Z.

AU - Xu, F. R.

PY - 2013/2/12

Y1 - 2013/2/12

N2 - 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.

AB - 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.

KW - Gamow-Teller states

KW - SU(4) supermultiplet

KW - T=0 pairing interaction

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