SORPTION BEHAVIOR OF SHORT-LIVED W-ISOTOPE, HF-ISOTOPE AND TA-ISOTOPEON ION-EXCHANGERS FROM HCL HF SOLUTIONS IN FAST ONLINE EXPERIMENTS/

In fast on-line experiments, shea-lived isotopes of tungsten and tanta lum can be separated from hafnium using an ion exchange system consist ing of two columns (Dowex 50X8, Dowex 1X8) and 0.05 M HCl/1 . 10(-3) M HF aqueous solution as eluent. This chemical system can be recommende d for investigations of the elements 105 and 106. Moreover, determinat ion of nuclear physical data of short-lived nuclides is possible. The half-life of Hf-165 was determined to be 78.6 +/- 1 s.