Monopole Shift in Odd Neutron-Rich F Isotopes: A Shell Model Description

TL;DR

This paper investigates the monopole shift in proton states of odd neutron-rich fluorine isotopes using shell model calculations, revealing shell closures at N=14 and 16 and their disappearance at N=20.

Contribution

It provides a shell model analysis of monopole shifts across neutron numbers N=10 to 20 in odd F isotopes, highlighting shell closure phenomena.

Findings

Shell closures at N=14 and 16 identified.

Disappearance of shell closure at N=20.

Calculated low-lying states in sd shell.

Abstract

Monopole shift in the proton states in odd neutron rich F isotopes has been studied with neutron number changing from N = 10 to 20 for three different interactions. The variation of monopole shift point out towards appearance of shell closure at N = 14 and N = 16 and its disappearance at N = 20. Low lying states of odd F isotopes have also been calculated in the limited configuration space of {\it sd} shells for these interactions.