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An EC-branch in the decay of 27-s 263Db: Evidence for the isotope 263Rf
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Published/Copyright:
September 25, 2009
Summary
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%.
Published Online: 2009-9-25
Published in Print: 2003-1-1
© 2003 Oldenbourg Wissenschaftsverlag GmbH
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Articles in the same Issue
- Study of 194Tlg decay
- Reactions of Am(III) and Eu(III) with potassium ferricyanide in nitric acid solutions
- Uranyl(VI) complexes with alpha-substituted carboxylic acids in aqueous solution
- Soluble and particle-bound 234,238U, 226Ra and 210Po in ground waters
- Use of combined solvent extraction-electrodeposition techniques to uranium and thorium isotopes analysis in industrial phosphoric acid, phosphate and phosphogypsum by alpha-particle spectrometry
- Photoexcitation of europium(III) in various electrolytes: Dependence of the luminescence lifetime on the type of salts and the ionic strength
- Effects of basicity and FeO concentration on the retention of 137Cs and 60Co in slag made from non-metallic radioactive wastes
- Characterization of complexation reactions of mono- and bidentate-hydroxymethyl phosphine ligands with the organometallic 99mTc(I)(OH2)3(CO)3+ synthon
- An EC-branch in the decay of 27-s 263Db: Evidence for the isotope 263Rf
