Emergence of rotational bands in ab initio no-core configuration interaction calculations

TL;DR

This paper demonstrates the emergence of rotational bands in ab initio no-core configuration interaction calculations for p-shell nuclei, specifically analyzing Be isotopes, and compares the results with experimental data.

Contribution

It shows that ab initio NCCI calculations can predict rotational bands in nuclei, providing a direct link between fundamental nuclear interactions and observed rotational phenomena.

Findings

Rotational patterns observed in excitation energies, electromagnetic moments, and transitions.

Predicted rotational band parameters closely match experimental data.

Robust signatures of nuclear rotation are identified in ab initio calculations.

Abstract

Rotational bands have been observed to emerge in ab initio no-core configuration interaction (NCCI) calculations for p-shell nuclei, as evidenced by rotational patterns for excitation energies, electromagnetic moments, and electromagnetic transitions. We investigate the ab initio emergence of nuclear rotation in the Be isotopes, focusing on 9Be for illustration, and make use of basis extrapolation methods to obtain ab initio predictions of rotational band parameters for comparison with experiment. We find robust signatures for rotational motion, which reproduce both qualitative and quantitative features of the experimentally observed bands.