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

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.