Improved measurement of the transition strength for using the SPICE spectrometer
Résumé
The selenium isotopes lie at the heart of a tumultuous region of the nuclear chart where shape coexistence effects grapple with neutron-proton pairing correlations, triaxiality, and the impending proton drip line. In this work, a study of by internal conversion electron and -ray spectroscopy was undertaken with the SPICE and TIGRESS arrays. New measurements of the branching ratio and lifetime of the state were performed, yielding a determination of milliunits. Two-state mixing calculations were performed that highlighted the importance of interpretation of such strength values in the context of shape coexistence.