Structure of the quartetting ground state of N=ZN=Z nuclei

preprint2020arXivOpen access

Abstract

The formal equivalence between the quartetting picture and the symmetry restored BCS picture is established for the ground state correlations induced by the general isovector-isoscalar pairing interaction. Multiple ground state structures compatible with the particle number and isospin symmetries are evaluated. The competition of isovector and isoscalar correlations is discussed for the N=ZN=Z nuclei above 100^{100}Sn.

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