关键词: 低能电子散射, Monte Carlo方法, 多元介质, 平均散射截面

Abstract: Using Monte Carlo method of low energy electron scattering in polybasic medium based on the mean cross section,the scattering process of the low energy electron in the range of E₀≤5 keV has been numerically simulated.A series of the results,such as the backscattering coefficients,the energy spectrum and angular distribution of backscattered electrons,the interaction range of both primary and backscattered electrons in medium,energy dissipation distribution,have been obtained and compared with those calculated by the method of determining scattering center.The calculated results by both methods are in excellent agreement widely,showing the effectiveness and reliability of the method based on mean cross section.Also,the calculated results on the angular distributions of backscattered electrons seem not to follow a cosine law for both the lower energies as well as the medium with larger mean atomic number.

Key words: low energy electron scattering, Monte Carlo method, polybasic medium, mean cross section