Low-lying electromagnetic transition strengths in Pt-180

Lifetime measurements have been performed using the Mo-98(Kr-86, 4n)Pt-180 reaction at a beam energy of 380 MeV, and the recoil distance Doppler-shift method. In a second experiment the Yb-168(O-16, 4n)Pt-180 reaction at a beam energy of 88 MeV using the Ge-gated gamma-gamma fast timing technique was used to determine lifetimes. Lifetimes of the four lowest yrast states of Pt-180 have been determined. The experimental data are compared to calculations within the framework of the interacting boson model and the general collective model. Both models predict a deformed ground state and are consistent with all the remaining experimental results.