Speaker
Description
(On behalf of the EURICA collaboration)
The structure of nuclei in the vicinity of doubly magic $^{100}$Sn offer insight to the interplay between the seniority scheme in closed-shell nuclei and isoscalar proton-neutron interactions which are prevalent in $N \sim Z$ nuclei. Below $^{100}$Sn, information on the excited states of $N \sim Z$ nuclei is accessible by isomeric decays and $\beta$-delayed $\gamma$-ray spectroscopy with limited production rates.
A decay spectroscopy experiment was performed at the RI Beam Factory of RIKEN Nishina Center. A 345-MeV/u $^{124}$Xe beam was fragmented on a $^{9}$Be target, producing record quantities of $^{100}$Sn and other proton-rich isotopes in its vicinity. Ion implantation and $\beta$ decays were measured with the Wide-
range Active Silicon-Strip Stopper Array for Beta and ion detection (WAS3ABi), and $\gamma$ rays were measured with the EUroball-RIKEN Cluster Array (EURICA).
Half-lives and transition strengths of many $\gamma$-decaying isomeric states were measured. New isomeric decay information was obtained in $^{92}$Rh, $^{96}$Ag and $^{98}$Cd, consistent with shell-model calculations. As one of the highlights of the experiment, the low-spin structure $^{96}$Cd was revealed for the first time.
