caa a22 4500 465732836 CHVBK 20180323111746.0 cr unu---uuuuu 170327e19901201xx s 000 0 eng 10.1007/BF02039611 doi (NATIONALLICENCE)springer-10.1007/BF02039611 Plutonium(III) oxidation under α-irradiation in nitric acid solutions [Elektronische Daten] [N. Andreychuk, A. Frolov, K. Rotmanov, V. Vasiliev] Plutonium(III) oxidation under high energy α-irradiation in nitric acid solutions has been studied relative to concentrations of both nitric acid (0.12-2.9 mol/l) and plutonium (1.4-10 mmol/l) using spectrophotometric techniques. Curium-244 has been used as the basic alpha-irradiation source. It has been stated that in solutions with nitric acid concentrations lower than 0.5 mol/l plutonium(III) does not oxidize completely. In the course of the process the formation of a plutonium(IV) peroxide complex is observed. Increase in the nitric acid concentration results in that in both the rate and degree of plutonium(III) oxidation. When cHNO 3 is higher than 0.5 mol/l the peroxide complex does not form and the process assumes an autocatalytic character. It has also been shown that plutonium(III) oxidation kinetics is significantly affected by nitrous acid, one of the nitrate ion radiolysis products. To describe plutonium chemical transformations under irradiation in nitric acid solutions, a kinetic scheme is proposed. The calculations have been carried out on a BESM-6 computer; a satisfactory agreement between the calculated and experimental data has been obtained. Akadémiai Kiadó, 1990 Andreychuk N. Lenin Research Institute of Atomic Reactors, Dimitrovgrad, USSR aut Frolov A. Lenin Research Institute of Atomic Reactors, Dimitrovgrad, USSR aut Rotmanov K. Lenin Research Institute of Atomic Reactors, Dimitrovgrad, USSR aut Vasiliev V. Lenin Research Institute of Atomic Reactors, Dimitrovgrad, USSR aut Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 143/2(1990-12-01), 427-432 0236-5731 143:2<427 1990 143 10967 https://doi.org/10.1007/BF02039611 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02039611 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Andreychuk N. Lenin Research Institute of Atomic Reactors, Dimitrovgrad, USSR aut NATIONALLICENCE 700 1- Frolov A. Lenin Research Institute of Atomic Reactors, Dimitrovgrad, USSR aut NATIONALLICENCE 700 1- Rotmanov K. Lenin Research Institute of Atomic Reactors, Dimitrovgrad, USSR aut NATIONALLICENCE 700 1- Vasiliev V. Lenin Research Institute of Atomic Reactors, Dimitrovgrad, USSR aut NATIONALLICENCE 773 0- Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 143/2(1990-12-01), 427-432 0236-5731 143:2<427 1990 143 10967 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer