Microscopic study of the deformed neutron halo of 31Ne

TL;DR

This study investigates the deformed neutron halo in 31Ne using advanced computational methods, revealing large neutron radii and the dominance of core-excited components in multiple states.

Contribution

It applies AMD+RGM calculations and analytical continuation techniques to analyze the structure and resonant states of 31Ne, providing new insights into its neutron halo properties.

Findings

Large neutron radius in the ground state

Ground and first excited states dominated by core-excited components

Second excited state involves valence neutron in f-wave

Abstract

The properties of the deformed halo of 31Ne were discussed using the antisymmetrized molecular dynamics plus resonating group method (AMD+RGM). The AMD+RGM calculations describe a large neutron radius for the ground state and reveal that the ground state is dominated by core-excited components. The resonant states were also investigated by applying the analytical continuation of the coupling constant. It was found that the first excited state (the 5/2- state) is also dominated by core-excited components and has a small decay width, whereas the second excited state (the 7/2- state) is dominated by the valence neutron in the $f$-wave coupled to the ground state of 30Ne.