The theory of development of impact ionization and excitation in liquids

The approach is based on consideration of the time evolution of the electron energy distribution function and uses the analytical solutions of the unsteady Boltzmann kinetic equation for electrons in liquids, taking into account their elastic and inelastic collisions with liquid particles. Ionization delay time and characteristic time for avalanche ionization growth in liquids are determined. The mechanisms of ionization involving excitons are also considered. The theory can be applied to liquid rare gases, pure and with admixtures