Simulation Experiments on On-Line Isolation of Element 106 (Seaborgium, Sg) and Study of Its Chemistry in H2SO4 and H2SO4/HF Solutions

Model experiments with W and Mo were performed to simulate on-line ion-exchange isolation of element 106 (seaborgium, Sg) from H 2 SO 4 and H 2 SO 4 /HF solutions. Short-lived isotopes of W and Mo were prepared by Sm( 24 x Mg, xn )W nuclear reaction performed on a U-400 cyclotron. Molybdenum isotopes were prepared on an MT-25 microtron (Flerov Laboratory of Nuclear Reactions, JINR, Dubna) by fission of 235 U with photoneutrons. The feasibility of isolation and chemical study of 265 Sg in the course of its preparation and of identification of this radionuclide by long-lived daughter product, 253 Fm, was demonstrated. The correlation of ion-exchange properties of W, Hf, Sr, and REE (TPE) under static and on-line conditions was revealed.