PROLATE AND OBLATE ROTATIONAL BANDS IN SM-136

Six rotational bands have been established in Sm-136 following heavy-i on induced reactions carried out at the Nuclear Structure Facility, Da resbury. The yrast band has been observed up to I(pi) = (24+) and unde rgoes three band-crossings. A band was observed built on the low-lying 2+ gamma-vibrational state, in addition to two negative parity sideba nds built on two-quasiproton excitations. A dipole band showing the ch aracteristics of collective oblate rotation was also established. The results am discussed in terms of total Routhian surface and cranked Wo ods-Saxon model calculations.