Stolze, S, Grahn, T, Julin, R, Joss, DT 
ORCID: 0000-0001-5763-8767, Andgren, K, Auranen, K, Boenig, S, Cox, D, Darby, IG, Doncel, M et al (show 29 more authors)
(2021)
Single-particle and collective excitations in the transitional nucleus Os-166.
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, 48 (12).
p. 125101.
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Abstract
The mean lifetimes of the lowest energy 2+, 8+ and 9- states in 166Os have been measured using the recoil distance Doppler-shift method in conjunction with a selective recoil-decay tagging technique. These measurements extend studies into the most neutron-deficient mass region accessible to current experimental methods. The B(E2; 2+ → 0+) = 7(2) W.u. extracted from these measurements is markedly lower than those observed in the heavier even-mass Os isotopes. The 8+ and 9- states yield reduced transition probabilities that are consistent with single-particle transitions. While these values may indicate a departure from collective structure, the level scheme and the underlying nuclear configurations can also be interpreted in terms of a simple collective picture. This contrasting behaviour suggests an intriguing dichotomy in the description of heavy transitional nuclei.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | mean lifetimes, RDDS measurements, gamma-ray spectroscopy, collectivity, single-particle states, electromagnetic transitions |
| Divisions: | Faculty of Science and Engineering > School of Physical Sciences |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 25 Oct 2021 10:04 |
| Last Modified: | 18 Jan 2023 21:25 |
| DOI: | 10.1088/1361-6471/ac2889 |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3141591 |
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