Evidence for a strongly deformed band in Y-80 using isomer decay tagging -art. no. 067303

The technique of isomer decay tagging (IDT) has been recently implemented a t Oak Ridge National Laboratory to identify strongly deformed bands above a short-lived isomer in Y-80. The IDT method provides very clean reaction ch annel selection of prompt in-beam decays by correlating these events with d elayed events detected at the focal plane of a recoil separator. Using this method, coincident transitions above and below a 4.7 mus isomer in Y-80 we re observed. The placement of this isomer in the Y-80 level scheme is furth er confirmed and the deformed structure of the rotational bands built on th e isomer is discussed.