Shell-model structure of exotic nuclei beyond 132Sn

TL;DR

This paper uses a shell model with a realistic effective interaction to study exotic nuclei beyond 132Sn, accurately predicting known spectra and forecasting the unknown spectrum of 136Sn.

Contribution

It introduces a shell model approach employing a V-low-k derived from the CD-Bonn potential for exotic nuclei beyond 132Sn, with successful predictions and new spectrum forecasts.

Findings

Calculated spectra agree well with experimental data for 134Sn and 135Sb.

Predicted the unknown spectrum of 136Sn.

Validated the effectiveness of the V-low-k interaction in exotic nuclei.

Abstract

We report on a study of exotic 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 smooth low-momentum potential, V-low-k, that is used directly as input for the calculation of the effective interaction. In this paper we focus attention on the nuclei 134Sn and 135Sb which, with an N/Z ratio of 1.68 and 1.65, respectively, are at present the most exotic nuclei beyond 132Sn for which information exists on excited states. Comparison shows that the calculated results for both nuclei are in very good agreement with the experimental data. We present our predictions of the hitherto unknown spectrum of 136Sn.