Determination of the structure of $^{31}$Ne by full-microscopic framework

TL;DR

This paper uses a full-microscopic framework combining AMD, RGM, and DFM to analyze reaction cross sections of neon isotopes, revealing the structure of $^{31}$Ne as deformed with a halo.

Contribution

It presents the first quantitative analysis of neon isotope reaction cross sections using a comprehensive microscopic approach, accurately describing $^{31}$Ne's halo and deformation.

Findings

$^{31}$Ne has a halo structure with spin-parity $3/2^-$.

The model accurately reproduces measured cross sections without adjustable parameters.

$^{31}$Ne exhibits strong deformation and a halo structure.

Abstract

We perform the first quantitative analysis of the reaction cross sections of $^{28-32}$Ne by $^{12}$C at 240 MeV/nucleon, using the double-folding model (DFM) with the Melbourne $g$-matrix and the deformed projectile density calculated by the antisymmetrized molecular dynamics (AMD). To describe the tail of the last neutron of $^{31}$Ne, we adopt the resonating group method (RGM) combined with AMD. The theoretical prediction excellently reproduce the measured cross sections of $^{28-32}$Ne with no adjustable parameters. The ground state properties of $^{31}$Ne, i.e., strong deformation and a halo structure with spin-parity $3/2_{}^-$, are clarified.