Structure of Low-Lying Positive-Parity States in 99,101,103 Ru from In-Beam Fast-Timing Measurements

Ru were populated in ( ,n ) reactions. Half-lives in the sub-nanosecond range were measured by using the ROSPHERE ray array. Re- sults for the first 3/2 + states in 99;101 Ru and the first 7/2 + states in 99;101;103 Ru were obtained and are discussed within the Rigid-Triaxial-Rotor-plus-Particle model. Calculated level energies are in good agreement with the experimental level scheme but the model fails in reproduction of some of the reduced tran- sition probabilities. This is, most probably, due to wave function admixtures which are outside the model space.