An EC-branch in the decay of 27-s 263Db: Evidence for the isotope 263Rf

  title={An EC-branch in the decay of 27-s 263Db: Evidence for the isotope 263Rf},
  author={Jens Volker Kratz and A. N{\"a}hler and U. Rieth and Andreas K. Kronenberg and Bernhard Kuczewski and Erik Strub and Willy Br{\"u}chle and Matthias Sch{\"a}del and B. Schausten and Andreas T{\"u}rler and Heinz Walter G{\"a}ggeler and Dieter T. Jost and Kenneth E. Gregorich and Heino Nitsche and Carola A. Laue and Ralf Sudowe and Philip A. Wilk},
  journal={Radiochimica Acta},
  pages={59 - 62}
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… Expand

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  • Phys. A 565, 1
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  • Acta 84, 69
  • 1999
  • Rev. C 45, 1064
  • 1992
  • Rev. C 42, 674
  • 1990