Abstract
In-beam gamma -ray spectroscopy has been performed for high-spin states of 83Sr and 85Sr, populated through the 74,76Ge(12C, 3n gamma ) reactions, respectively. Gamma-ray angular distributions and recoil-distance Doppler-shift measurements provided branching ratios, multipolarity mixing ratios and lifetimes of the electromagnetic decays of these states. The results are discussed in terms of the existing nuclear model calculations. Also, calculations of positive-parity states are presented, performed on the basis of the asymmetric rotor model (with variable moment of inertia). This model gives a reasonable description of the experimental data for 83Sr, but it fails in the case of 85Sr.