Study on the product ionization of nuclear reactions induced by heavy ions

Studies of the ionization of V, Sc, Co, Cu, Ga, Dy, Pb and Po recoil atoms from nuclear reactions with 16O, 22Ne and 40Ar ions are carried out using a magnetic analyser. The obtained charge distribution of the recoil atoms shows that for isotopes in mass reqion of A 40-70 these are close to the calculated values. With increaosing atomic number and excitation energy the contribution grows of additional ionization of recoil atoms due to the formation of inner-shell vacancies which is the result of strong internal conversion of nuclear transition accompanied by the Auger electrons. About 90% of heavy recoil atoms undergo additional ionization