Abstract
Simultaneous studies of the effect of CO adsorption on ion scattering (ISS), high energy (200 eV) secondary ion emission (SIMS) and ion produced photon emission (IPP) due to low energy He +, Ne + and Ar + bombardment of Ni and Mo are reported. A model involving localised deexcitation or neutralisation of particles scattered or ejected from the different surface sites is shown to fit the experimental results. The SIMS and photon yields indicate that a constant fraction of the ejected particles are ionised or excited at a given coverage with CO and this fraction changes linearly with coverage.
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