The scattering of He atoms from an ordered layer of Xe atoms on Cu(001) with energy analysis

The scattering of He atoms from an ordered layer of Xe atoms deposited on Cu(001) is described. Energy analysis was carried out using a LiF crystal analyser. Energy gain and loss events were observed, the values of which were independent of the parallel momentum transfer. Results are shown for varying degrees of coverage where at large coverages a change in the energy spectrum of the scattered atoms was observed. Adsorption of Xe on a Cu surface damaged by ion bombardment yielded no inelastic information — only an elastic component was detected.