Studies on scattering of fast H and He atoms from Fe films grown on Cu(0 0 1)

The structure of ultrathin epitaxial Fe films grown on Cu(0 0 1) at room temperature is investigated by grazing scattering of fast H and He atoms. By making use of ion beam triangulation, direct information on the atomic structure of the film and substrate surfaces are obtained. We discuss a new variant of this method based on the detection of the number of emitted electrons. The data is analyzed via computer simulations using classical mechanics which provides a quantitative analysis with respect to projectile trajectories.