Table of Contents
Physics Research International
Volume 2011, Article ID 451670, 16 pages
http://dx.doi.org/10.1155/2011/451670
Review Article

Geminate Recombination in the Presence of Scavengers: The New Vision of the Old Problem

1Institute of Chemical Kinetics and Combustion, SB RAS, 630090 Novosibirsk, Russia
2Department of General Physics, Novosibirsk State University, 630090 Novosibirsk, Russia

Received 6 September 2010; Accepted 25 January 2011

Academic Editor: Ali Hussain Reshak

Copyright © 2011 S. G. Fedorenko et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A geminate reaction between 𝐴 and 𝐵 reactants affected by the bulk reaction between 𝐵 and scavengers 𝐶 is discussed. The exact solution of the problem obtained recently for randomly walking 𝐵 reactant (excess electron) is compared with the superposition approximation commonly used to interpret experimental data. Distinctions related to the important role of time correlations between geminate and bulk reactions are analyzed. The largest deviations exponentially growing in time are observed for geminate reaction rate in the presence of scavengers. It is shown that superposition approximation can decrease essentially the ultimate probability of geminate recombination. The difference is great enough to lead to qualitatively incorrect description of the experiment even at small concentration of scavengers. This, in turn, may give rise to considerable errors in the determination of geminate pair parameters or, alternatively, to the wrong information about bulk kinetics of electron scavenging.