Eur. Phys. J. A (2019) 55: 5
https://doi.org/10.1140/epja/i2019-12679-4

Regular Article - Theoretical Physics

Low-lying dipole strengths for probable p-wave one-neutron halos in the medium mass region

¹ Department of Physics, Indian Institute of Technology, 247667, Roorkee, Uttarakhand, India
² Nuclear Reaction Data Centre, Faculty of Science, Hokkaido University, 060-0810, Sapporo, Japan
³ Physique Nucléaire Théorique et Physique Mathématique, Université Libre de Bruxelles (ULB), C. P. 229, B 1050, Brussels, Belgium

^* e-mail: manju@ph.iitr.ac.in

Received: 25 September 2018
Accepted: 13 December 2018
Published online: 23 January 2019

Abstract

The one-neutron halos lying in the island of inversion around has provided the podium to study the variation of total low-lying dipole strength with the neutron separation energy. We study three probable p -wave one-neutron halo candidates ³¹Ne and ³⁴Na and ³⁷Mg lying in the island of inversion. A simple analytic model has been used for the calculation of the total low-lying dipole strength for the medium mass p -wave one-neutron halos. A correction factor to this analytical model has been estimated with a realistic Woods-Saxon potential. A comparison of these analytic calculations has been made with those performed by a finite-range distorted-wave Born approximation theory of the Coulomb dissociation. We also make an estimate of the one-neutron separation energies of ³¹Ne, ³⁴Na and ³⁷Mg.