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 editorsBrunet, 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 seriesPhysical Review C

ISSN2469-9985

eISSN2469-9993

Publication year2021

Publication date28/05/2021

Volume103

Issue number5

Article number054327

PublisherAmerican Physical Society (APS)

Publication countryUnited States

Publication languageEnglish

DOIhttps://doi.org/10.1103/PhysRevC.103.054327

Publication open accessOpenly available

Publication channel open accessPartially 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.


Keywordsphysics

Free keywordsbeta decay; electromagnetic transitions; nuclear structure and decays


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Ministry reportingYes

Reporting Year2022

JUFO rating2


Last updated on 2024-26-03 at 09:20