RADIOLYSIS OF AQUEOUS-SOLUTIONS OF GADOLINIUM NITRATE

The specific effect due to Gd3+ ion on the radiolysis of aqueous nitrate solutions was determined by measurement of H2, H2O2 and NO2- radiolytic yields produced by gamma-irradiation of aerated and deaerated solutions of gadolinium, sodium and calcium nitrates in the concentration range of 10-5 to 0.3M. Important O2 consumption in aerated and O2 evolution in deaerated Gd(NO3)2 solutions was found by radiolysis in comparison with the inert cations nitrates. In the former the Gd3+ ion generates an O2 transporter producing an increase in the H2O2 yield and a decrease in the NO2- yield, while in the latter it enhances the H2 and NO2- production with respect to the same nitrate concentration of the Na+ solutions. © 1990 Akadémiai Kiadó.