Previous dynamical studies at hyperthermal energies involve the scattering of sodium from a tungsten surface which was represented as a cluster. It was found the electron transfer probability was large as the atom approached the surface and that the transfer took place in a localized region a few Angstroms from the surface. There was also a large dependence of the transfer probability on the collision energy. Inelastic collisions were also investigated. The work function dependence of sputtering of alkalis from surfaces has been studied and agreement with experiment was obtained.
Future research involves diatomics and triatomics interacting with surfaces.
Prototype studies are planned for homonuclear molecules and molecular ions and heteronuclear ions and molecules. It would be of special interest to determine the effect of the combination of the ion charge and oscillating dipole on the charge transfer process. Both scattering and sputtering studies are planned for these systems. Studies involving interactions with semiconductors characterized by a band gap and electronic excitations near surfaces are also planned.