A1 Journal article (refereed)
Competition between allowed and first-forbidden β decays of At208 and expansion of the Po208 level scheme (2021)
Brunet, M., Podolyák, Zs., Berry, T. A., Brown, B. A., Carroll, R. J., Lica, R., Sotty, Ch., Andreyev, A. N., Borge, M. J. G., Cubiss, J. G., Fraile, L. M., Fynbo, H. O. U., Gamba, E., Greenlees, P., Harkness-Brennan, L. J., Huyse, M., Judson, D. S., Konki, J., Kurcewicz, J., . . . De Witte, H. (2021). Competition between allowed and first-forbidden β decays of At208 and expansion of the Po208 level scheme. Physical Review C, 103(5), Article 054327. https://doi.org/10.1103/PhysRevC.103.054327
JYU authors or editors
Publication details
All authors or editors: Brunet, M.; Podolyák, Zs.; Berry, T. A.; Brown, B. A.; Carroll, R. J.; Lica, R.; Sotty, Ch.; Andreyev, A. N.; Borge, M. J. G.; Cubiss, J. G.; et al.
Journal or series: Physical Review C
ISSN: 2469-9985
eISSN: 2469-9993
Publication year: 2021
Publication date: 28/05/2021
Volume: 103
Issue number: 5
Article number: 054327
Publisher: American Physical Society (APS)
Publication country: United States
Publication language: English
DOI: https://doi.org/10.1103/PhysRevC.103.054327
Publication open access: Openly available
Publication channel open access: Partially open access channel
Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/80421
Abstract
The structure of 208Po populated through the EC/β+ decay of 208At is investigated using γ-ray spectroscopy at the ISOLDE Decay Station. The presented level scheme contains 27 new excited states and 43 new transitions, as well as a further 50 previously observed γ rays which have been (re)assigned a position. The level scheme is compared to shell model calculations. Through this analysis approximately half of the β-decay strength of 208At is found to proceed via allowed decay and half via first-forbidden decay. The first-forbidden transitions predominantly populate core excited states at high excitation energies, which is qualitatively understood using shell model considerations. This mass region provides an excellent testing ground for the competition between allowed and first-forbidden β-decay calculations, important for the detailed understanding of the nucleosynthesis of heavy elements.
Keywords: physics
Free keywords: beta decay; electromagnetic transitions; nuclear structure and decays
Contributing organizations
Related projects
- ENSAR2 European Nuclear Science and Application Research 2
- Jokinen, Ari
- European Commission
Ministry reporting: Yes
Reporting Year: 2022
JUFO rating: 2