A1 Journal article (refereed)
Single-particle and collective excitations in the transitional nucleus 166Os (2021)

Stolze, S., Grahn, T., Julin, R., Joss, D. T., Andgren, K., Auranen, K., Bönig, S., Cox, D., Darby, I. G., Doncel, M., Eeckhaudt, S., Greenlees, P. T., Hadinia, B., Herzáň, A., Jakobsson, U., Jones, P., Juutinen, S., Ketelhut, S., Konki, J., . . . Uusitalo, J. (2021). Single-particle and collective excitations in the transitional nucleus 166Os. Journal of Physics G: Nuclear and Particle Physics, 48(12), Article 125101. https://doi.org/10.1088/1361-6471/ac2889

JYU authors or editors

Publication details

All authors or editors: Stolze, Sanna; Grahn, Tuomas; Julin, R; Joss, D T; Andgren, K; Auranen, Kalle; Bönig, S; Cox, Daniel; Darby, I G; Doncel, M; et al.

Journal or series: Journal of Physics G: Nuclear and Particle Physics

ISSN: 0954-3899

eISSN: 1361-6471

Publication year: 2021

Volume: 48

Issue number: 12

Article number: 125101

Publisher: IOP Publishing

Publication country: United Kingdom

Publication language: English

DOI: https://doi.org/10.1088/1361-6471/ac2889

Publication open access: Not open

Publication channel open access:

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/78281


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.

Keywords: experimental methods; measurement; physics; gamma radiation; spectroscopy

Free keywords: mean lifetimes; RDDS measurements; gamma-ray spectroscopy; collectivity

Contributing organizations

Ministry reporting: Yes

Reporting Year: 2021

JUFO rating: 2

Last updated on 2022-14-09 at 12:07