Excited states and reduced transition probabilities in Os 168
Grahn, T., Stolze, S., Joss, D. T., Page, R. D., Sayğ, B., O'Donnell, D., . . . Wood, J. L. (2016). Excited states and reduced transition probabilities in Os 168. Physical Review C, 94 (4), 044327. doi:10.1103/PhysRevC.94.044327
Published inPhysical Review C
© 2016 American Physical Society. Published in this repository with the kind permission of the publisher.
The level scheme of the neutron-deficient nuclide 168Os has been extended and mean lifetimes of excited states have been measured by the recoil distance Doppler-shift method using the JUROGAM γ -ray spectrometer in conjunction with the IKP Koln plunger device. The ¨ 168Os γ rays were measured in delayed coincidence with recoiling fusion-evaporation residues detected at the focal plane of the RITU gas-filled separator. The ratio of reduced transition probabilities B(E2; 4+ 1 → 2+ 1 )/B(E2; 2+ 1 → 0+ 1 ) is measured to be 0.34(18), which is very unusual for collective band structures and cannot be reproduced by interacting boson model (IBM-2) calculations based on the SkM* energy-density functional.