Spectrum analysis of three-body recombination rates for non-Maxwellian electron distributions under ultra-fast laser irradiation

Abstract

Calculation of the three-body recombination rate is reformulated in a manner in which the velocity contribution is more explicit and the recombination rate is spectrum analysed for electron velocity distributions under ultra-fast laser irradiation. Electron distribution functions are calculated by using a two-dimensional Fokker-Planck simulation. The shape of the recombination rate spectrum with respect to the velocity is found to be well described by vf(v) where f(v) is the pitch-angle-averaged velocity distribution. It is shown visually that the increase in the slow electron population effectively enhances the recombination rate. The effect of a model energy loss on the recombination rate is also discussed.