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HK: Fachverband Physik der Hadronen und Kerne
HK 41: Structure and Dynamics of Nuclei VII
HK 41.4: Talk
Wednesday, March 30, 2022, 15:00–15:15, HK-H7
Nuclear charge radii of neutron-deficient scandium isotopes — •Kristian König1,2, Robert Powel1,3, Andrew Klose4, Stephan Fritzsche5, Jeremy Lantis1,6, Yuan Liu1, Kei Minamisono1,3, Witek Nazarewicz1,3, Wilfried Nörtershäuser2, Skyy Pineda1,6, Paul-Gerhard Reinhard7, and Dominic Rossi2 — 1FRIB, Michigan State University — 2Institut für Kernphysik, Technische Universität Darmstadt — 3Department of Physics and Astronomy, Michigan State University — 4Department of Chemistry, Augustana University — 5Helmholtz-Institute Jena — 6Department of Chemistry, Michigan State University — 7Institut für Theoretische Physik II, Universität Erlangen-Nürnberg
Charge radii of neutron deficient 40,41Sc (Z=21) isotopes have been determined at the BEam COoler and LAser spectroscopy facility at FRIB to investigate the N=20 shell closure. Particularly, the typical kink structure in the charge radius evolution at N=20 is very weak in Ar, K and Ca while it is strongly pronounced at N=28. With one additional proton in the 1f7/2 shell in Sc, additional cross-shell interactions occur and affect the behavior at the shell closure. The results will be presented, which promote a global understanding of the structure around 40Ca, and the weak shell-closure signature at N=20.
This work is supported by NSF grant PHY-15-65546.