Abstract
Vibrational excitation in NO/ Ag scattering is discussed within the adiabatic approxima tion. Taking into account the observed change of NO stretch frequency on adsorption the observed magnitude and energy dependence of molecular vibrational excitation can ·be described with reasonable parameters. At low energies the observed temperature depen dence can be explained semi-quantitatively by taking the coupling to phonons into account. It is pointed out that the observed temperature dependence poses problems in both the adiabatic as well as the nonadiabatic models. Further investigations are needed to obtain unambiguous results concerning the relative importance of adiabatic and nonadiabatic effects in NO/ Ag scattering.
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