Excitation of adsorbed molecule vibrations in low energy electron scattering

摘要: We develop a theory of low energy electron loss spectroscopy vibrational modes molecules adsorbed on metal surfaces. Differential and total cross sections are calculated in the Distorted Wave Born Approximation, assuming i) strong elastic scattering surface, ii) direct electron-molecule interaction via electric dipole field associated with molecular vibration. The angular distributions discussed for at various distances above surface several energies impact angles. influence electronic screening dipolar oscillations is consequences classical induced “image” dipoles explored. It shown that “metal selection rule” known IR only approximately valid scattering. Finally, we give numerical estimates inelastic stretching vibrations CO molecule transition surfaces, reasonable agreement experiments.