Shape difference implied by quenched Coriolis interaction inOs175

Chance near degeneracy of rotational states in the 1/$2^{\mathrm{-}}$[521] and 5/$2^{\mathrm{-}}$[512] bands in ${}_{}{}^{175}{}_{}{}^{}\mathrm{Os}$ leads to mixing and connecting E2 transitions. Analysis of the observed branching ratios gives an interaction matrix element of about 4 keV, an order of magnitude smaller than the expected Coriolis interaction, deduced from particle-rotor calculations. A difference in deformation of 25% between the two configurations, as suggested by the larger unperturbed moment of inertia in the 1/$2^{\mathrm{-}}$[521] band, would explain the quenched interaction.