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

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, e pre -, plays a role in determining the total yield of electrons scavenged in a number of systems. The significance of e pre - scavenging on yields depends on the scavenger of interest and on the rate coefficient of the scavenger's reaction with the hydrated electron, e aq - . For Cd 2+, where the reaction (e aq - + Cd 2+ ) is fast, the consequences of e pre - scavenging are experimentally not apparent, for NO 3 -, a less efficient e aq - scavenger, the effects of e pre - reaction are apparent in concentrated solutions, and for SeO 4 2-, an inefficient e aq - scavenger, e pre - scavenging is obvious even in dilute solution.