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Impact of uncertainties of unbound 10Li on the ground state of two-neutron halo 11Li

by Jagjit Singh and W. Horiuchi

Submission summary

As Contributors: Wataru Horiuchi · Jagjit Singh
Preprint link: scipost_201911_00043v1
Date submitted: 2019-11-28
Submitted by: Singh, Jagjit
Submitted to: SciPost Physics Proceedings
Proceedings issue: 24th European Few Body Conference (University of Surrey, U.K.)
Discipline: Physics
Subject area: Nuclear Physics - Theory
Approach: Theoretical

Abstract

Recently, the energy spectrum of 10Li was measured upto 4.6 MeV, via d(9Li, p)11Li, one-neutron transfer reaction. Considering the ambiguities on the 10Li continuum spectrum with reference to new data, we report the con guration mixing in the ground state of the two-neutron halo nucleus 11Li for two different choices of the 9Li+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 11Li.

Current status:
Editor-in-charge assigned


Submission & Refereeing History

Submission scipost_201911_00043v1 on 28 November 2019

Reports on this Submission

Report 1 by Eduardo Garrido on 2019-12-2 Invited Report

Report

In this paper the authors investigate the properties of $^{11}$Li for two different choices of the $^{10}$Li-n potential.

The main remark I have refers actually to the choice made for the core-neutron potential. The two sets, A and B, use the same $p$-wave and $d$-wave potentials, which have the characteristic of using for both, $p$-waves and $d$-waves, a positive spin-orbit strength. This is reasonable for $p$-waves, since in this way the $p_{3/2}$ states are pushed up in energy, as it should be done to take care in some way of the Pauli principle (the $p_{3/2}$ shell is occupied by the neutrons in the core). However, if the same positive spin-orbit strength is used for the $d$-waves, the consequence is that the $d_{5/2}$ states will be higher than the $d_{3/2}$, which is very likely not right. In the text it is said that the $d_{5/2}$ resonance lies around 2.98 MeV. Since the spin-orbit strength is positive I guess there is a $d_{3/2}$ state below this energy. Is this correct? In any case some comments about this I believe are necessary.

Also, the two potential sets give rise to a quite different partial wave content in $^{11}$Li. Is there any conclusion by the authors concerning which of these two $^{11}$Li structures is more likely? Some comment about this, at least in the conclusions, would be welcome.

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