Emergent clustering phenomena in the framework of the ab initio symmetry-adapted no-core shell model

0499258 - ÚJF 2019 RIV US eng C - Conference Paper (international conference)
Launey, K. D. - Mercenne, A. - Sargsyan, G. H. - Shows, H. - Baker, R. B. - Miora, M. E. - Dytrych, Tomáš - Draayer, J. P.
Emergent clustering phenomena in the framework of the ab initio symmetry-adapted no-core shell model.
AIP Conference Proceedings. Vol. 2038. Melville: AIP Publishing, 2018, č. článku 02004. ISBN 978-0-73541-764-9. ISSN 0094-243X.
[4th International Workshop on State of the Art in Nuclear Cluster Physics (SOTANCP4). Texas (US), 13.05.2018-18.05.2018]
R&D Projects: GA ČR GA16-16772S
Institutional support: RVO:61389005
Keywords : intermediate-mass nuclei * SA-NCSM * no-core shell-model theory
OECD category: Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

This article discusses the emergence - from first principles - of collectivity and clustering in light and intermediate-mass nuclei, up to the calcium region, with implications for reproducing enhanced E2 transitions in deformed nuclei, and for further understanding the formation of alpha clustering. Structure calculations use nucleon-nucleon chiral potentials and are based on the ab initio symmetry-adapted no-core shell model (SA-NCSM) that expands the reach of the no-core shell-model theory to heavier nuclei and enables the description of spatially enhanced nuclear configurations. This is achieved by using a physically relevant symmetry-adapted basis, which exploits approximate symmetries that, we find, dominate the nuclear dynamics. Important implications that have deepened our understanding of emergent phenomena in nuclei, such as enhanced collectivity, giant resonances, pairing, and clustering, are discussed for Be, C, O, Ne, and Ti isotopes.
Permanent Link: http://hdl.handle.net/11104/0291488