On the Radiation Chemical Kinetics of the Precursor to the Hydrated Electron

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Abstract

Comparisons of the predictions of stochastic diffusion kinetic calculations using electron track structures with experimental scavenger data show that the precursor to the hydrated electron, epre-, plays a role in determining the total yield of electrons scavenged in a number of systems. The significance of epre- scavenging on yields depends on the scavenger of interest and on the rate coefficient of the scavenger's reaction with the hydrated electron, eaq-. For Cd2+, where the reaction (eaq- + Cd2+) is fast, the consequences of epre- scavenging are experimentally not apparent, for NO3-, a less efficient eaq- scavenger, the effects of epre- reaction are apparent in concentrated solutions, and for SeO42-, an inefficient eaq- scavenger, epre- scavenging is obvious even in dilute solution.

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