Rotational bands and shape changes in Rh-105

The Rh-105 nucleus has been studied by in-beam gamma spectroscopy with the heavy-ion fusion-evaporation reaction Mo-100(B-11, alpha 2n gamma) at 39 MeV. Gamma-gamma-t coincidences and directional correlation ratios were measured. Four rotational bands have been identified with similar characteristics to those in other A approximate to 100 odd-proton nuclei. The positive-parity yrast band based on the pi g(9/2) configuration and the negative-parity pi p(1/2) band, showing large signature splittings, exhibit band crossings at the frequencies of 0.38 MeV and 0.48 MeV, respectively. Experimental Routhians and alignments as well as B(M1)/B(E2) ratios were extracted. The structure of the bands was interpreted within the framework of the cranked shell model and total Routhian surface calculations.