Shape difference implied by quenched Coriolis interaction inOs175

Chance near degeneracy of rotational states in the 1/2{sup {minus}}(521) and 5/2{sup {minus}}(512) bands in {sup 175}Os leads to mixing and connecting {ital E}2 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{sup {minus}}(521) band, would explain the quenched interaction.