Dominant Modes in Light Nuclei - Ab Initio View of Emergent Symmetries

37th Symposium on Nuclear Physics

Draayer, J.P.^1 ; Dytrych, T.^1 ; Launey, K.D.^1 ; Dreyfuss, A.C.^1 ; Langr, D.^2

Department of Physics and Astronomy, Louisiana State University, Baton Rouge

LA

70803, United States^1

Department of Computer Systems, Czech Technical University in Prague, Prague, Czech Republic^2

关键词: Ab initio investigation;    Core-shell model;    Dominant mode;    Emergent phenomenon;    First principles;    Light nuclei;    Mass regions;    Nuclear dynamics;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/578/1/012010/pdf
DOI  :  10.1088/1742-6596/578/1/012010

来源: IOP

【 摘 要 】

An innovative symmetry-guided concept is discussed with a focus on emergent symmetry patterns in complex nuclei. In particular, the ab initio symmetry-adapted no-core shell model (SA-NCSM), which capitalizes on exact as well as partial symmetries that underpin the structure of nuclei, provides remarkable insight into how simple symmetry patterns emerge in the many-body nuclear dynamics from first principles. This ab initio view is complemented by a fully microscopic no-core symplectic shell-model framework (NCSpM), which, in turn, informs key features of the primary physics responsible for the emergent phenomena of large deformation and alpha-cluster substructures in studies of the challenging Hoyle state in Carbon-12 and enhanced collectivity in intermediate-mass nuclei. Furthermore, by recognizing that deformed configurations often dominate the low-energy regime, the SA-NCSM provides a strategy for determining the nature of bound states of nuclei in terms of a relatively small subspace of the symmetry-reorganized complete model space, which opens new domains of nuclei for ab initio investigations, namely, the intermediate-mass region, including isotopes of Ne, Mg, and Si.