6533b7d2fe1ef96bd125ea6b
RESEARCH PRODUCT
An EC-branch in the decay of 27-s 263Db: Evidence for the isotope 263Rf
B. SchaustenU. RiethP. A. WilkBernhard KuczewskiKenneth E. GregorichC. A. LaueHeino NitscheJ. V. KratzA. NählerA. KronenbergW. BrüchleHeinz W. GäggelerRalf SudoweErik StrubAndreas TürlerD.t. JostMatthias Schädelsubject
Chemical separationchemistry.chemical_compoundCyclohexanechemistryIsotopeElutionAnalytical chemistryHalf-lifeNuclidePhysical and Theoretical Chemistrydescription
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%.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2003-01-01 | Radiochimica Acta |