Thermalization times of hot electrons

Hot electrons are produced in a liquid by the process of ionization by high energy radiation, by photoionization, or by injection from a cathode. Electrons which are produced by high energy radiation usually have initial kinetic energies of the order 

Estimated value from field dependence of electron mobility Molecular dynamics simulation. 

In the ionization process, electrons are ejected with a mean kinetic energy of approximately 20 eV. After one or two electronic excitations, electrons with a mean energy of several electronvolts will diffuse through the liquid and lose kinetic energy by elastic collisions with the rare gas atoms. 

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