Quasiparticle alignments and α-decay fine structure of 175Pt
Peura, P., Scholey, C., Joss, D. T., Juutinen, S., Julin, R., Bäck, T., . . . Watkins, H. V. (2014). Quasiparticle alignments and α-decay fine structure of 175Pt. Physical Review C, 89 (2), 024316. doi:10.1103/PhysRevC.89.024316
Published inPhysical Review C
Bäck, T. |
© 2014 American Physical Society. Published in this repository with the kind permission of the publisher.
Excited states and decay properties of 175Pt have been investigated using the 92Mo(86Sr,2pn) fusion-evaporation reaction. The JUROGAM I γ -ray spectrometer and the GREAT spectrometer were used in conjunction with the gas-filled recoil separator RITU for the measurement of the radiation at the target and focal plane positions, respectively. Two new band structures, assigned to be based on the I π = (7/2 −) ground state in 175Pt, have been established and the known yrast band has been extended up to I π = (49/2 +). Rotational properties of the excited states in 175Pt have been investigated within the cranked shell-model formalism. The low-frequency changes in the alignments of the positive- and negative-parity bands are interpreted as a sign of proton-pair excitations in the rotating core. Furthermore, the α-decay measurements reveal a candidate for a fourth α-decay branch in 175Pt, feeding a non-yrast state in 171Os.