A1 Journal article (refereed)
Decay spectroscopy of 171,172Os and 171,172,174Ir (2023)


Zhang, W., Cederwall, B., Doncel, M., Aktas, Ö., Ertoprak, A., Qi, C., Grahn, T., Nara Singh, B. S., Cullen, D. M., Hodge, D., Giles, M., Stolze, S., Auranen, K., Badran, H., Braunroth, T., Calverley, T., Cox, D. M., Fang, Y. D., Greenlees, P. T., . . . Valiente-Dobón, J.J. (2023). Decay spectroscopy of 171,172Os and 171,172,174Ir. Physical Review C, 107(1), Article 014308. https://doi.org/10.1103/PhysRevC.107.014308


JYU authors or editors


Publication details

All authors or editorsZhang, W.; Cederwall, B.; Doncel, M.; Aktas, Ö.; Ertoprak, A.; Qi, C.; Grahn, T.; Nara Singh, B. S.; Cullen, D. M.; Hodge, D.; et al.

Journal or seriesPhysical Review C

ISSN2469-9985

eISSN2469-9993

Publication year2023

Publication date19/01/2023

Volume107

Issue number1

Article number014308

PublisherAmerican Physical Society (APS)

Publication countryUnited States

Publication languageEnglish

DOIhttps://doi.org/10.1103/PhysRevC.107.014308

Publication open accessOpenly available

Publication channel open accessPartially open access channel

Publication is parallel published (JYX)https://jyx.jyu.fi/handle/123456789/85983


Abstract

We report on a study of the α-decay fine structure and the associated Eα−Eγ correlations in the decays of 171,172Os and 171,172,174Ir. In total, 13 new α-decay energy lines have been resolved, and three new γ-ray transitions have been observed following the new decay branches to 168Re and 167W. The weak α-decay branch from the bandhead of the νi13/2 band in 171Os observed in this work highlights an unusual competition between α, β, and electromagnetic decays from this isomeric state. The nucleus 171Os is therefore one of few nuclei observed to exhibit three different decay modes from the same excited state. The nuclei of interest were produced in 92Mo(83Kr,xpyn) fusion-evaporation reactions at the Accelerator Laboratory of the University of Jyväskylä, Finland. The fusion products were selected using the gas-filled ion separator RITU and their decays were characterized using an array of detectors for charged particles and electromagnetic radiation known as GREAT. Prompt γ-ray transitions were detected and correlated with the decays using the JUROGAM II germanium detector array surrounding the target position. Results obtained from total Routhian surface (TRS) calculations suggest that α-decay fine structure and the associated hindrance factors may be a sensitive probe of even relatively small shape changes between the final states in the daughter nucleus.


Keywordsnuclear physicsspectroscopy


Contributing organizations


Ministry reportingYes

Reporting Year2023

Preliminary JUFO rating2


Last updated on 2024-10-03 at 17:46