Primary trapping and solvated electron yields. Part 1. Recombination kinetics. Part 2. Correlation between G-value and neutralization efficiency

Abstract

The isothermal decay of luminescence emitted in frozen hydrocarbons as a result of the recombination of trapped electrons with aromatic solute cations has been studied in relation to theoretical models for the primary processes of radiolysis. The kinetics were determined on a time scale extending from 20 to 800 ns, with radiations of different LET. In polar liquids the influence of physical as well as chemical properties of the solvent on the yield G(e^– _solv) at a given time (t= 3 ns) has been investigated: in particular, evidence was found of the existence of a correlation between the survival probability of e^– _solv and the efficiency factor of the e^– _solv-cation recombination, which had so far been assumed to be limited only by diffusion.