By using a parallel acquisition electron energy analyzer, the presence of a sub-monolayer coverage of Cl on in vacuo cleaved (110) surfaces was observed. From the time evolution of the Auger features, together with sample absorption current images and residual gas analyses, it was clear that both electron-stimulated desorption and surface diffusion took place, and that these were affected by the presence of 2 adsorption sites of differing strength. The sample absorption current images provided a rapid means of measuring the spatial distribution of Cl; thereby distinguishing the effects of desorption and diffusion.

Surface Diffusion and Electron Stimulated Desorption of Chlorine from InP(110) and GaAs(110). M.Jacka, A.Kale: Applied Surface Science, 2003, 191[1-4], 344-51