AG DEPOSITION ONTO XE - CLUSTERING, INCORPORATION, AND SURFACE ATTRACTION

Processes associated with Ag-atom deposition on condensed layers of Xe have been investigated using high-resolution x-ray photoemission. Depositions of small amounts of Ag produce distinct signatures that correspond to metallic clusters on the Xe layer and isolated atoms or small clusters embedded in the Xe film. The binding energy of the latter is dependent on the Xe thickness because of substrate-mediated differences in core-hole screening. Time-dependent studies show that Ag clusters formed on the surface are attracted to the surface via van der Waals forces, sinking in the Xe layer with rates that are dependent on temperature.