Decay of 180Re: Search for octupole states in 180W

Study of the decay of 2.45-min 180Re leads to the observation of about 90 γ rays and a number of new levels in 180W. Spins and parities of many of the levels observed are determined using the logft values of positron population and/or the γ-ray depopulation. The allowed unhindered decay from the (π5/2+[402up-arrow]-ν7/2-[514arrow-down])1- 180Re ground state indicates fragmentation of the (π5/2+[402up-arrow]-π9/2-[514up-arrow])2- configuration among a number of 2- states in 180W. We find tentative observation of the K=1- and 0- components of the octupole vibration. This would establish the excitation energy of all four expected octupole components in 180W