Ab initio no-core shell model study of 18-23O and 18-24F isotopes

Abstract

In the present work, we have done a comprehensive study of the low-lying energy spectrum for oxygen and fluorine chains using an ab initio no-core shell model. We have used an inside-nonlocal outside-Yukawa (INOY) potential, which is a two-body interaction but also has the effect of three-body forces via short range and nonlocal character. Also, we have performed calculations with N3LO and N2LO opt interactions and compared corresponding results with the experimental data and phenomenological USDB interaction. We have reached up to N max = 6 for 18-21 O and18-19F, N max = 4 for other oxygen and fluorine isotopes, respectively. We have also discussed the binding energy of oxygen and fluorine chains. Over binding in the ground state (g.s.) energy in neutron rich oxygen isotopes is observed in our largest model space calculations. © 2020 IOP Publishing Ltd.