Excited states and reduced transition probabilities in 168Os
- Grahn, T
- Stolze, S
- Joss, JT
- Page, RD
- Saygi, B
- O'Donnell, D
- Akmali, M
- Andgren, K
- Bianco, L
- Cullen, DM
- Dewald, A
- Greenlees, PT
- Heyde, K
- Iwasaki, H
- Jakobsson, U
- Jones, P
- Judson, DS
- Julin, R
- Juutinen, S
- Ketelhut, S
- Leino, M
- Lumley, N
- Mason, PJR
- Moller, O
- Nomura, K
- Nyman, M
- Petts, A
- Peura, P
- Pietralla, N
- Pissulla, T
- Rahkila, P
- Sapple, PJ
- Saren, J
- Scholey, C
- Simpson, J
- Sorri, J
- Stevenson, PD
- Uusitalo, J
- Watkins, HV
- Wood, JL
DOIAbstract
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 \gamma-ray spectrometer in conjunction with the IKP K\"oln plunger device. The 168Os \gamma 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^+ \rightarrow 2_1^+)/B(E2;2_1^+ \rightarrow 0_1^+) is measured to be 0.34(18), which is very unusual for collective band structures and cannot be reproduced by IBM-2 model calculations based on the SkM* energy-density functional
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