Interplay between antimagnetic and collective rotation in Fe-58

TL;DR

This paper uses covariant density functional theory to explore antimagnetic and collective rotation in Fe-58, revealing their interplay and dominance in different bands through detailed theoretical analysis.

Contribution

It demonstrates the coexistence and competition of antimagnetic and collective rotation in Fe-58 using a self-consistent tilted axis cranking approach.

Findings

Both bands exhibit antimagnetic rotation characteristics.

Collective rotation dominates in Band 4.

Ratios of moments of inertia and B(E2) values reflect the interplay.

Abstract

The self-consistent tilted axis cranking covariant density functional theory based on the point- coupling interaction PC-PK1 is applied to investigate the possible existence of antimagnetic ro- tation in the nucleus Fe-58. The observed data for Band 3 and Band 4 are reproduced well with two assigned configurations. It is found that both bands correspond to a rotation of antimagnetic character, but, due to the presence of considerable deformation, the interplay between antimag- netic rotation and collective motion plays an essential role. In particular for Band 4, collective rotation is dominant in the competition with antimagnetic rotation. Moreover, it is shown that the behavior of the ratios between the dynamic moments of inertia and the B(E2) values reflects the interplay between antimagnetic and collective rotation.