Shell gaps and pn pairing interaction in N = Z nuclei

Details Shell gaps and pn pairing interaction in N = Z nuclei Shell gaps and pn pairing interaction in N = Z nuclei

2008-11-25

arxiv.org/abs/0811.4093v1

Phys.Lett.B671:42-45,2009

Physics

Nuclear Physics

Nuclear Theory

9 pages, 5 figures

Scientific paper

10.1016/j.physletb.2008.11.072

We analyze the observed shell gaps in N=Z nuclei determined from the binding energy differences. It is found that the shell gaps can be described by the combined contributions from the single-particle level spacing, the like-nucleon pairing, and the proton-neutron pairing interaction. This conclusion is consistent with that of Chasman in Phys. Rev. Lett. 99 (2007) 082501. For the double-closed shell N=Z nuclei, the single-particle level spacings calculated with Woods-Saxon potential are very close to those obtained by subtracting the nn pairing interaction from the observed shell gap. For the sub-closed or non-closed shell N=Z nuclei, the pn pairing interaction is shown to be important for the observed shell gaps.

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