Efficacy of the symmetry-adapted basis for ab initio nucleon-nucleus interactions for light- and intermediate-mass nuclei

Authors

A. Mercenne, Louisiana State University
K. D. Launey, Louisiana State University
T. Dytrych, Nuclear Physics Institute of the Academy of Sciences of the Czech Republic v. v. i.
J. E. Escher, Lawrence Livermore National Laboratory
S. Quaglioni, Lawrence Livermore National Laboratory
G. H. Sargsyan, Louisiana State University
D. Langr, Czech Technical University in Prague
J. P. Draayer, Louisiana State University

Document Type

Article

Publication Date

11-1-2022

Abstract

We study the efficacy of a new ab initio framework that combines the symmetry-adapted (SA) no-core shell-model approach with the resonating group method (RGM) for unified descriptions of nuclear structure and reactions. We obtain ab initio neutron-nucleus interactions for ⁴He, ¹⁶O, and ²⁰Ne targets, starting with realistic nucleon-nucleon potentials. We discuss the effect of increasing model space sizes and symmetry-based selections on the SA-RGM norm and direct potential kernels, as well as on phase shifts, which are the input to calculations of cross sections. We demonstrate the efficacy of the SA basis and its scalability with particle numbers and model space dimensions, with a view toward ab initio descriptions of nucleon scattering and capture reactions up through the medium-mass region.

Publication Source (Journal or Book title)

Computer Physics Communications

Recommended Citation

Mercenne, A., Launey, K., Dytrych, T., Escher, J., Quaglioni, S., Sargsyan, G., Langr, D., & Draayer, J. (2022). Efficacy of the symmetry-adapted basis for ab initio nucleon-nucleus interactions for light- and intermediate-mass nuclei. Computer Physics Communications, 280 https://doi.org/10.1016/j.cpc.2022.108476