ИСТИНА

Investigation of chemical properties of new elements is one of the most contemporary task for chemists. Currently, superheavy elements (SHE) are being produced by irradiation of actinide target (240,242Pu, 241,243Am, 242,244Cm, 249Bk, 249Cf) with heavy ion beam [1]. Moreover, during this irradiation neutron-rich nuclei of heavy actinides (Es-Lr) are produced in multinucleon transfer reactions, which is a promising way to produce neutron-rich SHE nuclei [2]. However, predictable half-lives of new Es-Lr isotopes are low, so we need to improve our liquid-phase chemistry technique based on cation-exchange chromatography with α-HIB as an eluent. New technique is required to be highly sensitive and effective for actinide separation and to allow making quick separation. In our work, we suggest optimal parameters of Am, Cm, Cf separation, which are calculated, using plate model of chromatography. We determined concentration eluent levels needed when distribution coefficients of target elements are near zero. Results of previous experiments with these elements and calculated positions of heavy actinides at the chromatogram under our conditions will be discussed.