Proton excitation in the SD nuclei of the mass 190 region

The study of 193Tl, using EUROGAM phase 2 gamma array, revealed five superdeformed bands (SD) in this nucleus. The measured value of gK = 1.4 pm 0.17 for the two signature Yrast SD bands confirms the [642]5/2 intruder configuration for the odd proton. A saturation of the dynamic moment of inertia I2 is observed for these two bands. It can be understood in terms of an exhausted quasi-neutron alignment in the presence of substantially reduced quasi-proton alignment due to the Pauli blocking. From band interactions and I2 behaviours, intrinsic configurations involving the [411]1/2 and [651]1/2 proton orbitals, are assigned to the excited SD bands. (author). 20 refs, 4 figs