MOLECULAR-BEAM SCATTERING BY A SURFACE IN THE PARTIALLY ROUGH SPHERE MODEL

The partially rough sphere model is adopted to study rototranslational dynamics of molecule-surface scattering. Analytical expressions for d istributions over linear and angular velocities are derived and averag ed energies are calculated. The model allows to investigate the tangen tial force influence on the outgoing molecular beam characteristics an d describes out-of-plane scattering and nonzero 'orientation'. The eff ect of the attractive branch of the molecule-surface potential and the generalization of the model on trapping-desorption processes are also discussed.