TY - JOUR
T1 - Role of T=0 pairing in Gamow-Teller states in N=Z nuclei
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.
N1 - Funding Information:
We are grateful to Toshio Suzuki, M. Honma, M. Ichimura, K. Yako and T. Wakasa for valuable discussions. This work is supported by the National Natural Science Foundation of China under Grant Nos. 10875172 , 10275092 , 10675169 , and 11105094 , and financial supports from Sichuan University (Project Nos. 2010SCU11086 and 2012SCU04A11 ). This work was also supported by the Japanese Ministry of Education, Culture, Sports, Science and Technology by Grant-in-Aid for Scientific Research under the program numbers (C) 22540262 .
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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U2 - 10.1016/j.physletb.2012.12.060
DO - 10.1016/j.physletb.2012.12.060
M3 - Article
AN - SCOPUS:84873136874
VL - 719
SP - 116
EP - 120
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
SN - 0370-2693
IS - 1-3
ER -