Speaker
Dr
Joochun Park
(Lunds universitet)
Description
(On behalf of the EURICA collaboration)
The structure of magic nuclei far away from stability provides vital information on modern shell models. In particular, the doubly magic $^{100}$Sn and proton-rich nuclei in its vicinity contains many topics of interest: the limit of proton binding in this mass region, the robustness of the $N = Z = 50$ shell closures, and isospin symmetry among many others. Experimental properties of these nuclei are also relevant for precise predictions of the end stages of the rapid proton-capture process of nuclear astrophysics.
A decay spectroscopy experiment on $^{100}$Sn and other $N \sim Z \sim 50$ nuclei was performed at RIKEN Nishina Center, where a 345-MeV/u $^{124}$Xe beam was fragmented on a $^9$Be target. The isotopes of interest were identified and implanted on a set of Si detectors, which measured the positrons and protons from subsequent $\beta$ decays. $\gamma$ rays emitted from excited states were measured by HPGe detectors placed around the implantation detectors.
A summary of new and more precise experimental results will be presented. Highlights include the discovery of new isotopes, $\beta$-decay properties of the heaviest bound $N = Z - 1 $ nuclei, an update on the superallowed Gamow-Teller decay of $^{100}$Sn, and the structure of $^{96}$Cd.
Primary author
Dr
Joochun Park
(Lunds universitet)
