Realistic Shell-Model Calculations for Exotic Nuclei around Closed Shells

TL;DR

This paper uses realistic shell-model calculations with a renormalized nucleon-nucleon potential to accurately describe and predict the spectra of neutron-rich nuclei around 132Sn, including unknown states.

Contribution

It introduces a method employing a low-momentum potential derived from CD-Bonn for realistic shell-model calculations of exotic nuclei near closed shells.

Findings

Results agree well with experimental data for known nuclei.

Predictions made for the unknown spectrum of 136Sn.

Method effectively describes neutron-rich nuclei around 132Sn.

Abstract

We report on a study of neutron-rich nuclei around doubly magic 132Sn in terms of the shell model employing a realistic effective interaction derived from the CD-Bonn nucleon-nucleon potential. The short-range repulsion of the bare potential is renormalized by constructing a low-momentum potential, V-low-k, that is used directly as input for the calculation of the effective interaction. We present results for the four nuclei beyond the N=82 shell closure 134Sn, 134Sb, 136Sb, and 136Te. Comparison shows that our results are in very good agreement with the experimental data presently available for these exotic nuclei. We also present our predictions of the hitherto unknown spectrum of 136Sn.