Two-flux Monte Carlo approach to electron diffusion in solids

By means of Monte Carlo method the diffusion of monoenergetic beam of primary 30 keV electrons in bulk target of Al, Cu, and Au is simulated. The fast but correct simulation model is proposed, which is based on Fano theory for electron stopping and utilizes relativistic Hartree-Fock approximation for electron-atom elastic scattering. Computed values are averaged over 200.000 electron trajectories. The two-flux formulation is applied to study the angular and energy structure of electron probe inside the target and to compute the absolute value of X-ray production depth distribution. The simulation results are compared with those obtained experimentally and good agreement is observed. 12 refs.; 5 figs.; 1 tab