Impact of uncertainties of unbound ${}^{10}$Li on the ground state of two-neutron halo ${}^{11}$Li

Abstract

Recently, the energy spectrum of ${}^{10}$Li was measured upto 4.6 MeV, via one-neutron transfer reaction d(${}^9$Li, p)${}^{10}$Li. Considering the ambiguities on the ${}^{10}$Li continuum spectrum with reference to new data, we report the configuration mixing in the ground state of the two-neutron halo nucleus ${}^{11}$Li for two different choices of the ${}^9$Li$+$n potential. For the present study, we employ a three-body (core$+$n$+$n) structure model developed for describing the two-neutron halo system by explicit coupling of unbound continuum states of the subsystem (core$+$n), and discuss the two-neutron correlations in the ground state of ${}^{11}$Li.

Comments: Submission to SciPost, Proceedings of the 24th European Conference of Few-Body Problems in Physics (EFB24), Surrey, UK, 2-4 September 2019, 10 pages, 4 figures