Spectroscopy of 161Hf from low to high spin
Mason, P. J. R., Simpson, J., Paul, E. S., Riley, M. A., Auranen, K., Badran, H., . . . Wrigh, J. P. (2014). Spectroscopy of 161Hf from low to high spin. Physical Review C, 90 (5), 054331. doi:10.1103/PhysRevC.90.054331
Published inPhysical Review C
© 2014 American Physical Society. Published in this repository with the kind permission of the publisher.
Excited states in the neutron-deficient nucleus 161 72Hf89 have been populated using the 118Sn(48Ti,5n) 161Hf and 110Pd(56Fe,5n) 161Hf fusion-evaporation reactions at 240 and 270 MeV, respectively. The level scheme for 161Hf has been extended with the observation of new band structures and an I π = (13/2+) isomeric state with a half-life of 4.8(2) μs has been identified. The decay path from this isomer to the (7/2−) ground state is established. The yrast band, based on the (13/2+) isomeric state, is extended up to (73/2+) and side band structures are identified up to (69/2−) and (55/2−). Quasiparticle assignments for these rotational structures are made on the basis of their alignment properties and Woods-Saxon cranked shell-model calculations.