Three-body model for an isoscalar spin-triplet neutron-proton pair in Sb102

Abstract : We discuss the effect of a neutron-proton pair in the T=0,S=1 channel in the low-lying states of the Sb102=Sn100+p+n nucleus. To this end, we construct a core+p+n three-body model with a model space based on Skyrme and relativistic mean-field calculations. The latter model is found to be more realistic for the present case due to the pseudospin symmetry. It turns out that the (L,S,T)=(0,1,0) coupling scheme of valence nucleons is strongly hindered in Sb102 with the relativistic model because of the near degeneracy of the g7/2 and d5/2 orbitals in the valence space. The effect of this neutron-proton coupling is clearly seen in the charge-exchange Gamow-Teller-type transitions rather than in the binding energies of T=0 and T=1 states.
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Physical Review C, American Physical Society, 2016, 93 (6), pp.064319. 〈10.1103/PhysRevC.93.064319〉
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http://hal.in2p3.fr/in2p3-01344139
Contributeur : Sophie Heurteau <>
Soumis le : lundi 11 juillet 2016 - 13:47:39
Dernière modification le : jeudi 11 janvier 2018 - 06:12:41

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Y. Tanimura, H. Sagawa. Three-body model for an isoscalar spin-triplet neutron-proton pair in Sb102. Physical Review C, American Physical Society, 2016, 93 (6), pp.064319. 〈10.1103/PhysRevC.93.064319〉. 〈in2p3-01344139〉

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