Theoretical model for coupling geminate and volume ion recombination in irradiated nonpolar liquids

If nonpolar liquids are irradiated with relatively high doses of ionizing radiation, the decay of the charged intermediates (electrons, solvent cations or molecular secondary ions) involves a considerable portion of homogeneous recombination. Therefore, the frequently used single ion pair concept fails in describing the experimentally observed concentration-time behaviour. Based on a diffusion kinetic approach developed previously, a modified recombination model is suggested. It takes into account reactions between oppositely charged intermediates generated in different spurs, from the beginning of the recombination process up to a long time afterwards. (author)