Ab Initio Structure of p-Shell Nuclei with Chiral Effective Field Theory and Daejeon16 Interactions

TL;DR

This paper computes the structure of p-shell nuclei using ab initio methods with chiral and phenomenological interactions, achieving good agreement with experimental energies and spectra.

Contribution

It provides comprehensive No-Core Full Configuration calculations for p-shell nuclei using chiral EFT and Daejeon16 interactions, including excitation spectra.

Findings

Binding energies agree well with experiments

Both interactions show slight overbinding at the upper p-shell

Excitation energies match experimental data

Abstract

We present No-Core Full Configuration results for the ground state energies of all particle-stable p-shell nuclei, as well as the excitation energies of more than 40 narrow states, excluding isobaric analog states. We used the chiral LENPIC nucleon-nucleon plus three-nucleon interaction at N2LO with semi-local coordinate space regulators, and also the phenomenological Daejeon16 nucleon-nucleon potential. With simple exponential extrapolations of the total energies of each state, binding energies and spectra are found to be in good agreement with experiment. Both interactions produce a trend towards some overbinding of nuclei at the upper end of the p-shell.