A simple scattering model-providing analytical expressions of electron inverse mean free path, stopping power and straggling parameter-is proposed. Such a model can be used in Monte Carlo simulations of electron transport problems. Cross-sections are derived from a schematic Bethe surface based on the single-mode approximation for the free electron gas. Fairly good agreement with experiment results and with other theoretical calculations is found for electron energies in the range between 50 eV and 50 keV for free-electron-like materials. An easy empirical correction to the conduction band cross-section allows one to use the model for transition and noble metals.
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Salvat et al. (1985) studied this question.
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