Decay spectroscopy of 171,172Os and 171,172,174Ir
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
Julkaistu sarjassa
Physical Review CPäivämäärä
2023Tekijänoikeudet
© Authors 2023
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.
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American Physical Society (APS)ISSN Hae Julkaisufoorumista
2469-9985Asiasanat
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https://converis.jyu.fi/converis/portal/detail/Publication/177177505
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This work was supported by the Swedish Research Council under Grants No. 2019-04880 and No. 2019-04808; the United Kingdom Science and Technology Facilities Council (STFC); the EU 7th Framework Programme, Integrating Activities Transnational Access, Project No. 262010 ENSAR; and the Academy of Finland under the Finnish Centre of Excellence Programme (Nuclear and Accelerator Based Physics Programme at JYFL). E.I., Y.D.F., and M.K.R. acknowledge support from the International Joint Research Promotion Program of Osaka University. W.Z. acknowledges support from the China Scholarship Council under Grant No. 201700260239. ...Lisenssi
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