Yrast band of 109Ag described by tilted axis cranking covariant density functional theory with a separable pairing force

TL;DR

This paper introduces a new computational method combining tilted axis cranking covariant density functional theory with a separable pairing force to accurately model rotational bands in open shell nuclei, exemplified by 109Ag.

Contribution

It develops and applies a novel approach integrating a separable Gogny pairing force into the covariant density functional framework for nuclear structure calculations.

Findings

Successfully reproduces experimental spectra and transition probabilities

Identifies an abrupt transition in the rotational axis orientation

Demonstrates the effectiveness of the separable pairing force in modeling rotational bands

Abstract

A separable form of the Gogny pairing force is implemented in tilted axis cranking covariant density functional theory for the description of rotational bands in open shell nuclei. The developed method is used to investigate the yrast sequence of 109Ag for an example. The experimental energy spectrum, angular momenta, and electromagnetic transition probabilities are well reproduced by taking into account pairing correlations with the separable pairing force. An abrupt transition of the rotational axis from the long-intermediate plane to the long-short one is obtained and discussed in detail.