Radiation chemical behavior of ions of the transuranium elements in nitric acid solutions

Journal Article · Wed Jan 01 04:00:00 EST 1975 · Sov. Radiochem. (Engl. Transl.); (United States)

OSTI ID:7187947

Vladimirova, M V; Kulikov, I A; Ryabova, A A

Data are presented on the radiation chemical reduction of NpO/sub 2//sup 2 +/ and PuO/sub 2//sup 2 +/ ions in solutions of HNO/sub 3/ under the action of ..gamma.. and ..cap alpha.. radiation. It was shown that the NpO/sub 2//sup 2 +/ ion in the region of (HNO/sub 3/) 10/sup -2/-10/sup -1/ M are reduced with yields of 5.0 and 6.0 ions/100 eV in ..gamma.. and ..cap alpha.. radiolysis. In the same region of (HNO/sub 3/), G(-PuO/sub 2//sup 2 +/) is significantly lower both in ..cap alpha.. and in ..gamma.. radiolysis. This is explained by the greater role of the reaction between the two radiolysis products H/sub 2/O/sub 2/ and HNO/sub 2/ in solutions of plutonium, which possesses rate constants of the reactions with H/sub 2/O/sub 2/ and HNO/sub 2/ lower than for NpO/sub 2//sup 2 +/ ions. It was shown that the rate of the reaction between H/sub 2/O/sub 2/ and HNO/sub 3/ depends on the dose rate (I), acidity, and (PuO/sub 2//sup 2 +/). With increasing I, the rate of the reaction between H/sub 2/O/sub 2/ and HNO/sub 3/ increases, while the yield of the reduction of PuO/sub 2//sup 2 +/ ions decreases. It was suggested that under equal conditions ((H/sup +/), (PuO/sub 2//sup 2 +/)), the reduction of /sup 238/Pu ions will occur with a lower yield than that of /sup 239/Pu.

• OSTI ID: 7187947
• Journal Information: Sov. Radiochem. (Engl. Transl.); (United States), Journal Name: Sov. Radiochem. (Engl. Transl.); (United States) Vol. 17:2; ISSN SVRDA
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
ACTINIDE COMPOUNDS
ALPHA PARTICLES
BEAMS
CATIONS
CHARGED PARTICLES
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHEMISTRY
ELECTROMAGNETIC RADIATION
GAMMA RADIATION
HYDROGEN COMPOUNDS
HYDROGEN PEROXIDE
INORGANIC ACIDS
IONIZING RADIATIONS
IONS
NEPTUNIUM COMPOUNDS
NEPTUNYL COMPOUNDS
NITRIC ACID
NITROUS ACID
OXYGEN COMPOUNDS
PARTICLE BEAMS
PEROXIDES
PHOTON BEAMS
PLUTONIUM COMPOUNDS
PLUTONYL COMPOUNDS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
REDUCTION
TRANSURANIUM COMPOUNDS
YIELDS