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The extraction behaviour of Rutherfordium (element 104, Rf), carrier-free Zirconium, and Hafnium in the system HCl–TBP (tributylphosphate) was examined. The 65-s α-emitting isotope 261 Rf was produced via the reaction 248 Cm( 18 O,5n). The recoil products were transported with a He(KCl) jet to the Automated Rapid Chemistry Apparatus (ARCA) where 1140 separations were performed...
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