Intrinsic states and collective structures in 180Ta

Excited states in [Formula Presented] have been identified using the [Formula Presented] and [Formula Presented] reactions and associated time-correlated [Formula Presented]-ray spectroscopy, including particle-[Formula Presented] coincidences for channel selection. As well as identifying the rotational band based on the [Formula Presented] two-quasiparticle state at 75 keV, at least eight other low-lying two-quasiparticle states and associated rotational bands have been established. Lifetimes in the few nanosecond region were isolated using [Formula Presented]-time techniques. Most of the observed two-quasiparticle states and some of the band members can be identified with states known from particle transfer studies. The properties of the observed [Formula Presented] partners of [Formula Presented] and [Formula Presented] bands from the [Formula Presented] configuration and the [Formula Presented] and [Formula Presented] pair from the [Formula Presented] configuration are discussed. High-[Formula Presented] structures identified include the band based on the four-quasiparticle [Formula Presented], [Formula Presented] isomer, a 32 ns, four-quasiparticle [Formula Presented] isomer, and a six-quasiparticle [Formula Presented] intrinsic state and its band. Configuration assignments are aided by analysis of the in-band decay properties, which confirm, for example, a predominantly [Formula Presented] configuration for the [Formula Presented] isomer. The results are compared with multiquasiparticle calculations. A number of yrast high-[Formula Presented] six- and eight-quasiparticle states which could be accessible in future studies are predicted.