One-neutron halo structure of ${}^{29}$Ne

Abstract

We have applied the Gamow shell model to calculate nuclear observables of ${}^{26-31}$Ne isotopes pertaining to one-neutron halo structure, these nuclei being situated close to neutron drip-line. As both many-body correlations and continuum coupling are taken into account in that approach, halo structure can be analyzed properly. Our calculations provide good descriptions of ${}^{26-31}$Ne, where asymptotic behavior is crucial for that matter. One-body density, neutron root-mean-square radii of ${}^{26-31}$Ne, and one-neutron overlap functions of ${}^{29,31}$Ne have been calculated as well. Our results support the presence of a one-neutron \textit{p}-wave halo in ${}^{31}$Ne, already pointed out experimentally. A similar situation also occurs in the ground state of ${}^{29}$Ne, which is mainly a \textit{p}-wave valence neutron coupled to the inner ${}^{28}$Ne \textit{core}. The $3/2^{+}$ excited state of ${}^{29}$Ne, which is dominated by a \textit{d}-wave valence neutron, has also been considered. A larger radius and more extended wave function occur for the ground state of ${}^{29}$Ne when compared to its $3/2^{+}$ first excited state. The present results suggest that ${}^{29}$Ne is a good candidate for one-neutron \textit{p}-wave halo in the medium-mass region.

7 Pages, 3 Figures