Ionization of water molecules by proton impact: Two nonperturbative studies of the electron-emission spectra

摘要

Two nonperturbative methods are applied to obtain total and singly differential (in the electron energy) cross sections of electron emission in proton collisions with H_2O at impact energies in the range 10 keV ≤E_p≤ 5 MeV. Both methods, one classical and one semiclassical, combine an independent particle treatment with a multicenter model potential description of the target. The excellent agreement obtained with experimental data supports the usefulness of the approximations involved and encourages the study of more complex systems.