Lifetimes of low-lying levels in the one- and three-quasiparticle bands in ${}^{133}$Ce have been measured using the recoil-distance Doppler-shift technique. The $E2\mathrm{}$ transition strengths extracted for the negative parity yrast states are well described by the triaxial-rotor-plus-quasiparticle and the geometrical models, but the interacting-boson-plus-fermion predictions are too small by about a factor of 3. The $B\left(M1\mathrm{}\right)\mathrm{}$ values extracted for the levels in the positive parity three-quasiparticle band are consistent with the previous $\nu h_{11/2}\otimes \pi h_{11/2}\otimes \pi g_{7/2}$ configuration assignment to this band.

• Received 23 August 1996

DOI:https://doi.org/10.1103/PhysRevC.55.2105