Improved measurement of the 0 transition strength for Se using the SPICE spectrometer

Smallcombe, J. ; Garnsworthy, A. B.*; Korten, W.*; Singh, P.*; Ali, F. A.*; Andreoiu, C.*; Ansari, S.*; Ball, G. C.*; Barton, C. J.*; Bhattacharjee, S. S.*; Bowry, M.*; Caballero-Folch, R.*; Chester, A.*; Gillespie, S. A.*; Grinyer, G. F.*; Hackman, G.*; Jones, C.*; Melon, B.*; Moukaddam, M.*; Nannini, A.*; Ruotsalainen, P.*; Starosta, K.*; Svensson, C. E.*; Wadsworth, R.*; Williams, J.*

Smallcombe, J.; Garnsworthy, A. B.*; Korten, W.*; Singh, P.*; Ali, F. A.*; Andreoiu, C.*; Ansari, S.*; Ball, G. C.*; Barton, C. J.*; Bhattacharjee, S. S.*; Bowry, M.*; Caballero-Folch, R.*; Chester, A.*; Gillespie, S. A.*; Grinyer, G. F.*; Hackman, G.*; Jones, C.*; Melon, B.*; Moukaddam, M.*; Nannini, A.*; Ruotsalainen, P.*; Starosta, K.*; Svensson, C. E.*; Wadsworth, R.*; Williams, J.*

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 dripline. In this work a study of Se 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.