Abstract
Considerable progress has been made towards our understanding of electron/ photon stimulated desorption (ESD/PSD) [1], Identification of the excited states responsible for desorption reveals that they usuaUy are many particle excitations (i.e. n holes (h)-n electrons (e), such 2h, 2h-1e etc.) and arise from widely different excitation mechanisms [2]. Furthermore, it is known that the lifetime of these localized excitations, which determine the probability for desorption, is very much altered by covalent interactions between the active site and its immediate environment [3]. In this work we shall examine “environmental” effects, which do not arise from alteration of the excited-state lifetime, but rather from: (1) the image charge induced in the metal substrate, (2) adsorbate-adsorbate interactions which reduce the symmetry and hence cause certain selection rules to breakdown, and (3) coherent scattering of electrons in the substrate.
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References
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Ramaker, D.E., Sambe, H. (1988). Image Charge, Coherent Scattering, and Symmetry Effects in Electron Stimulated Desorption: O− from O2 Condensed on Metals. In: Stulen, R.H., Knotek, M.L. (eds) Desorption Induced by Electronic Transitions DIET III. Springer Series in Surface Sciences , vol 13. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-73728-2_11
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DOI: https://doi.org/10.1007/978-3-642-73728-2_11
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