Sputtering of ice films by the bombardment of Ar+ ions

The process of sputtering ice films covered on Au(1 1 1) surface at normal incidence by Ar ions with an initial energy of E0 = 300 eV and 700 eV has been investigated by the molecular dynamic simulation. The mass spectrum and kinetic energy distributions have been calculated. Our simulations clearly show that the mass spectrum contains peaks of the water molecules, water clusters and Au atoms. These results are of interest for the study of mass spectrometry in films and surfaces.