Reaction of the H Atom in gamma-Irradiated Ferrous Sulfate Solutions

摘要

The effect of sulfuric acid, ferrous and ferric ion, and oxygen concentrations on G(Fe exp 3+ ) values from cobalt-60 gamma-irradiated soltuions has been studied. Kinetic expressions were derived for reaction models involving reactions of various forms of the H atom and additional reactions postulated to be of importance at high solute concentration. Three models were assumed invoking the additional reactions: (1) an independent yield of an excited water species; (2) increasing contributions from interspur reactions of well established species at increasing solute concentration; (3) inhibition of charge pair recombination by acid and scavenger species. The calculated G(Fe exp 3+ ) values from the various models were compared by the least squares method with experimental G(Fe exp 3+ ) values from over 600 irradiations. Model 3 provided the best fit to the data for the least number of adjustable parameters. No evidence for more than one form of H atom was found with this model. (Atomindex citation 09:373067)