'Exploring the evolution of nuclear moments and charge radii approaching 100Sn'

by Fredrik Olof Andre Parnefjord Gustafsson (KU Leuven (BE))

Thursday 8 Oct 2020, 15:15 → 16:15 Europe/Zurich

500/1-001 - Main Auditorium (CERN)

'The Collinear Resonance Ionization Spectroscopy technique has been used for studying nuclear moments and charge radii of neutron-deficient tin isotopes in the proximity of the heaviest self-conjugate doubly magic nucleus, 100Sn. Recently, state-of-the-art many-body methods including ab-initio calculations have been able to reach this important stepping-stone in the nuclear landscape, however, further progress is severely hindered by the lack of experimental data. The controversial robustness of the shell closure, insufficient understanding of the collective behavior and the unknown level ordering of the neutron d5/2 and g7/2 shell-model orbits further motivate the need to study this region. Using two newly developed laser ionization schemes the hyperfine structures and isotope shift of 124Sn down to 104Sn have been measured. These new measurements allow for the first determination of electromagnetic moments, changes in mean-square charge radii and ground-state spin assignments of 104-107Sn, shedding new light on the level ordering and collectivity approaching N=50.'