Improvement on the complex optical potential for electron collisions with atoms and molecules

The main goal of this work is to search for an effective potential that describes realistically the dynamics of electron-atom (-molecule) interactions over a wide incident energy range. We present a modification in the model absorption potential based on the quasi-free electron and binary-encounter approximations, originally proposed by Staszewska et al. Basically, in our model, an empirical scaling factor is proposed in order to correct the distortion of the absorption potential caused by the free-electron-gas approximation. This factor uses two parameters which are independent of targets and incident energies, therefore can be used as predictive purpose for a general target. Results for some atomic and molecular targets have shown the effectiveness of the present model.