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Radiochimica Acta

International Journal for chemical aspects of nuclear science and technology

Ed. by Qaim, Syed M.

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Rank 15 out of 32 in category Nuclear Science & Technology in the 2015 Thomson Reuters Journal Citation Report/Science Edition

SCImago Journal Rank (SJR) 2015: 0.470
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An EC-branch in the decay of 27-s 263Db: Evidence for the isotope 263Rf

J. V. Kratz / A. Nähler / U. Rieth / A. Kronenberg / B. Kuczewski / E. Strub / W. Brüchle / M. Schädel / B. Schausten / A. Türler / H. W. Gäggeler / D. T. Jost / K. E. Gregorich / H. Nitsche / C. Laue / R. Sudowe / P. A. Wilk

Citation Information: Radiochimica Acta. Volume 91, Issue 1, Pages 59–62, ISSN (Online) 2193-3405, ISSN (Print) 0033-8230, DOI: https://doi.org/10.1524/ract., September 2009

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27-s 263Db was produced in the 249Bk ( 18O, 4n) reaction at 93 MeV. The activity was transported by a He/KCl-jet to the laboratory where it was collected for 15 min and then subjected to a chemical separation specific for group-4 elements. The activity was dissolved in 0.5 M unbuffered α-HiB and eluted from a cation-exchange column. The effluent was made 9 M in HCl and group-4 tetrachlorides were extracted into TBP/Cyclohexane which was evaporated to dryness on a Ta disc. The Ta discs were assayed for α and SF activity. A SF activity with a half life on the order of 20 min was observed and assigned to the nuclide 263Rf. It is formed by electron-capture decay of 263Db with a decay branch of 3+4-1%.

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