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Monte Carlo investigation of electron-impact ionization in liquid xenon.

The electron-energy-distribution function, drift velocity, and ionization rate for electrons in liquid xenon have been calculated using a kinetic model for electron transport. The electron-scattering rates have been obtained with the Van Hove approach in which the liquid is characterized by the dynamic structure function S (q, ω). The threshold field for ionization E t (such that the ionization coefficient α¬=O for E>E t ) is found to be approximately 400 kV/cm. This value for E t as well as those for a are in good agreement with experiment. In particular, the minimum at high fields in the experimental α vs E curve is also present in the calculated results. These results serve to elucidate the kinetics of electron avalanches in liquids