THE KINEMATIC SEPARATOR VASSILISSA PERFORMANCE AND EXPERIMENTAL RESULTS

Within the last five years the kinematic separator VASSILISSA [A.V. Ye remin et al., Nucl. Instr. and Meth. A 274 (1989) 528; and A.V. Yeremi n et al., Preprint JINR E15-90-347, Dubna 1990] has been used for inve stigations of neutron deficient evaporation residues (ER) produced in heavy ion fusion reactions. In the course of this work optimization of the ion-optical and other systems of the separator including improvem ents of the focal plane detector system have been made. As a result, t he separation efficiency values ranging from 3 to 30% were achieved fo r ERs produced in the reactions with heavy ions ranging from O-16 to A r-40. The suppression factors > 10(19) for the full energy beam partic les and > 10(4) for multinucleon transfer reaction products were achie ved. The results of the performed experiments illuminating the separat or performance are briefly presented.