High-statistics beta-plus/EC decay study of Xe-122
ORAL
Abstract
The isotopes of Xe are centrally located with respect to the evolution of collectivity in the $Z>50$, $N<82$ region, which exhibits an extraordinarily smooth evolution of simple collective signatures. Excited $0^+$ states in $^{124-132}$Xe are very strongly populated, suggesting that there are important proton subshell gaps influencing the low-lying structure of these isotopes and possibly shape-coexistence that would lead to strong $E0$ transitions. However, collectivity in this region is very poorly characterized because of a lack of spectroscopic data for low-spin states. A high-statistics $^{122}$Cs $\beta^+/EC$ decay experiment to obtain detailed spectroscopic data for low spin states was performed at the TRIUMF-ISAC facility using the 8$\pi$ $\gamma$-ray spectrometer and PACES array of five Si(Li) detectors, for conversion electrons spectroscopy. Preliminary results will be presented.
*This work supported by the Natural Sciences and Engineering Research Council of Canada and the National Research Council of Canada.
