Rotating deformed halo nuclei and shape decoupling effects

TL;DR

This paper investigates the rotational properties of deformed halo nuclei using a combined theoretical approach, revealing persistent halo structures and shape decoupling effects during rotation.

Contribution

It introduces a self-consistent method combining DRHBc and AMP to study rotational states of deformed halo nuclei, highlighting shape decoupling phenomena.

Findings

Deformed halo structures persist from ground to rotational states.

Shape decoupling effects are observed in rotating deformed halo nuclei.

The approach accurately describes coupling between bound states and continuum.

Abstract

We explore the rotational feature of deformed halos by performing the angular momentum projection (AMP) on the ground state wave functions obtained from the deformed relativistic Hartree-Bogoliubov theory (DRHBc) in continuum. The DRHBc+AMP approach self-consistently describes the coupling between single particle bound states and the continuum not only in the ground state but also in rotational states. The rotational modes of deformed halos in $^{42}$Mg and $^{44}$Mg are investigated by studying properties of rotational states such as excitation energy, configuration, and density distribution. Our study demonstrates that the deformed halo structure persists from the ground state in the intrinsic frame to collective states. Especially, the typical behavior of shape decoupling effects in rotating deformed halo nuclei is revealed.