A Simplified Approach to Diffusion-Controlled Radical Reactions in the Tracks of Ionizing Radiations

Publisher Website
Google Scholar
Abstract
On the basis of the approximation that the track of an ionizing particle maybe supposed to consist of essentially nonoverlapping spurs, blobs, and short tracks radical reactions have been considered in the presence of scavenger over a large range of LET [linear energy transfer] for the primary particle. Results have been given in terms of fraction of recombining radicals in the long time limit. In some cases, the evolution of various radical fractions in time has been shown. Consideration has been made of scavenger depletion in the linear approximation of prescribed depeltion, and it has been concluded that in the present theory it is not an important effect. Throughout, a sharp boundary model has been used. In the scheme and appromixation used, consideration of spur (and blob) size distribution has been important. This was obtained for a 1-Mev primary with the use of the Monte Carlo technique, and the same relative spectrum was assumed for other energies. Results obtained for a primary have been compared with low LET cases (essentially isolated spur and/or blob) and also with a high LET case (individual short track). Results have also been compared with those of other models and with experiment (in respect to lowering of molecular yield with scavenger concentration).

This publication has 1 reference indexed in Scilit: