Abstract
The natural lineshapes of peaks in electron spectra due to decay of autoionizing states of Ne, formed in collisions of Ne with Mg and Al solid targets, are modelled. The modelling takes into account the level shifts of the excited and ionic states of the atom in front of the surface and various resonant and Auger capture and loss processes. It is shown that rather complex lineshapes may be expected. The electron spectrum will generally possess a peak at energies in the vicinity of that corresponding to autoionization of a free atom, as well as a high-energy tail and secondary maximum. It is suggested that a structure observed at 22.2 eV in the experimental Ne** electron spectrum is just such a secondary maximum associated with the decay of the Ne** 3P 3S2 near the metal surface. The effects of varying the model lifetimes, electron capture and deexcitation rates are discussed.
Published Version
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