High-spin structure in 187 Pt

High-spin states in 187 Pt were studied via the 173 Yb( 18 O, 4n) reaction. Rotational bands based on the νi 13/2 , ν7/2 − [503], νi 2 13/2 νj, ν3/2 − [512] and ν1/2 − [521] configurations were observed, and interpreted within the framework of the cranked shell model. The TRS calculations show that the νi 13/2 band has an appreciable negative γ deformation, and the negative-parity bands tend to have a near prolate shape with small positive γ values. Experimental values of B (M1)/ B (E2) ratios have been extracted and compared with theoretical values from the semi-classical Dönau and Frauendof approach, strongly suggesting a low frequency πh 9/2 alignment in the ν7/2 − [503] band.