Abstract
In order to study the ionization in the track of a high-energy electron in liquid cyclohexane, the lifetime distribution of the charged species is considered, with and without solutes present that can react with the species and change their mobility. Calculations of the lifetime distributions of the ions are presented, which have been made on the basis of the assumption that the precursors of the ion scavenging reactions can be considered as classically diffusing ions, initially present as pairs of oppositely charged species in each other's field. The calculations are compared with the lifetime distributions of biphenyl ions in solutions of biphenyl in cyclohexane with and without other solutes present, as determined by nanosecond pulse radiolysis. It is concluded that the precursor of the positive biphenyl ion is a positive species, which is considerably more mobile than a molecular ion.

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