Ab initio rotation in 10Be

TL;DR

This paper uses ab initio no-core configuration interaction calculations to explore rotational phenomena in 10Be, revealing coexisting rotational structures with different intrinsic deformations.

Contribution

It demonstrates that ab initio methods can predict emergent rotational structures and their intrinsic shapes in light nuclei like 10Be.

Findings

Identification of coexisting rotational bands in 10Be.

Evidence of different intrinsic deformations, including triaxial and axial shapes.

Neutron-driven large axial deformation in one of the structures.

Abstract

Ab initio theory describes nuclei from a fully microscopic formulation, with no presupposition of collective degrees of freedom, yet signatures of clustering and rotation nonetheless arise. We can therefore look to ab initio theory for an understanding of the nature of these emergent phenomena. To probe the nature of rotation in 10Be, we examine the predicted rotational spectroscopy from no-core configuration interaction (NCCI) calculations with the Daejeon16 internucleon interaction, and find spectra suggestive of coexisting rotational structures having qualitatively different intrinsic deformations: one triaxial and the other with large axial deformation arising primarily from the neutrons.