Intrinsic states and rotational bands in 177Pt

Rotational bands built on one- and three-quasiparticle states in 175 Ta have been populated through the 170 Er( 10 B,5n) reaction. The four previously known one-quasiproton bands based on intrinsic states arising from g 7 2 , d 5 2 , h 9 2 and h 11 2 parents were extended to higher spin. Two new three-quasiparticle states with K π = 17 2 + and 21 2 + and their rotational bands were established, as was the rotational band associated with the previously known K π = 21 2 − three-quasiparticle state at 1565.9 keV. B( M 1) B( E 2) and g K − g R values extracted from the in-band branching ratios, have been utilized, together with the decay properties and alignments, to assign configurations. A multi-quasiparticle calculation based on the Lipkin-Nogami method, including approximately the orbital-dependent residual nucleon-nucleon interactions, has been used to predict the multi-quasiparticle energies for comparison with experiment.