Abstract
The evolution in time of the recombination of ions in tracks produced by high-energy electrons was calculated by computer simulation of the diffusion and drift of the ions in each other's Coulumb field. The formation of singlet and triplet excited states on ion recombination was taken into account in the simulation codes. The time dependent probability f( t) of the singlet production on ion recombination was calculated for different groups of ion pairs. It was found that the initial geometry of the ionic cluster is of primary importance for the time evolution and asymptotic value of the probability f( t). Calculations have been carried out for ion groups of different sizes corresponding to different energy losses, using a simplified model for the initial configuration. The contributions of the ions in different clusters to the over-all kinetics of the singlet and triplet production in a 200 keV electron track were analyzed and the weighted averages for f( t) were obtained.
Published Version
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