Realistic shell-model calculations for neutron-rich calcium isotopes

TL;DR

This paper performs realistic shell-model calculations for neutron-rich calcium isotopes using a derived effective interaction, achieving good agreement with experimental data and exploring the role of the g9/2 orbital.

Contribution

It introduces a shell-model approach with a realistic interaction including the g9/2 orbital for calcium isotopes, comparing different core assumptions.

Findings

Calculated spectroscopic properties agree with experimental data.

The g9/2 orbital plays a significant role in heavy calcium isotopes.

Comparison shows the effectiveness of the V-low-k derived interaction.

Abstract

We study the neutron-rich calcium isotopes performing shell-model calculations with a realistic effective interaction. This is derived from the CD-Bonn nucleon-nucleon potential renormalized by way of the V-low-k approach, considering 48Ca as an inert core and including the neutron 0g9/2 orbital. We compare our results with experiment and with the results of a previous study where 40Ca was assumed as a closed core and the standard 1p0f model space was employed. The calculated spectroscopic properties are in both cases in very good agreement with the available experimental data and enable a discussion on the role of the g9/2 single-particle state in the heavy-mass Ca isotopes.