A monopole-optimized effective interaction for tin isotopes
Abstract
We present a systematic configuration-interaction shell model calculation on the structure of light tin isotopes with a new global optimized effective interaction. The starting point of the calculation is the realistic CD-Bonn nucleon-nucleon potential. The unknown single-particle energies of the 1d3/2, 2s1/2 and 0h11/2 orbitals and the T=1 monopole interactions are determined by fitting to the binding energies of 157 low-lying yrast states in 102-132Sn. We apply the Hamiltonian to analyze the origin of the spin inversion between 101Sn and 103Sn that was observed recently and to explore the possible contribution from interaction terms beyond the normal pairing.
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