Image charge effects in electron stimulated desorption:O−fromO2condensed on Ar films grown on Pt

Abstract

The electron-stimulated desorption yields of ${\mathrm{O}}^{\mathrm{-}}$ from ${\mathrm{O}}_2$ condensed on a platinum substrate, with a rare-gas spacer layer between the ${\mathrm{O}}_2$ and Pt, are reported. The results differ dramatically from those found in the gas phase. These differences are interpreted in terms of the image charge induced in the metal.