1986•Sov. Radiochem. (Engl. Transl.); (United States)Requires access
Investigation of influence of alpha irradiation on valence states of actinides. VIII. Reduction of berkelium (IV) in perchloric acid solutions
L.M. Frolova, V.Ya. Vasil'ev, V.M. Vitynutnev
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Abstract
A spectrophotometric method has been used in studying the radiation-chemical behavior of berkelium (IV) in perchloric acid solutions with intense internal alpha-irradiation by curium244. It has been shown that the reduction of berkelium (IV) in perchloric acid solutions with a concentration up to 3 M follows a zero-order reaction rate law relative to the berkelium (IV) concentration. In more concentrated solutions of perchloric acid, the equation for the rate of the berkelium (IV) reduction reaction has the form d (Bk(IV))/dt=k/sub 0/ + k/sub 1/(BK(IV)). In all of the perchloric acid solutions that were investigate (1-7 M), K /SUP '/ /sub 0/ is weakly dependent on the acid concentration; k'/sub 1/ depends on the acid concentration to a greater degree. Both k'/sub 0/ and k'/sub 1/ depend on the dose rate in irradiation of the solution. With high concentrations of perchloric acid, products of radiolytic decomposition of perchlorate ions play a major role.