Electron stimulated desorption of neutral species from (100) KCl surfaces
1992; Elsevier BV; Volume: 260; Issue: 1-3 Linguagem: Inglês
10.1016/0039-6028(92)90044-7
ISSN1879-2758
AutoresMarek Szymoński, A. Poradzisz, P. Czuba, J. Kołodziej, Piotr Piątkowski, J. Fine, L. Tanović, N. Tanović,
Tópico(s)Semiconductor materials and devices
ResumoComposition changes of a (100) KCl surface bombarded by 1 keV electrons have been studied by Auger electron spectroscopy. Intensity ratios of characteristic alkali and halogen Auger lines were monitored as a function of target temperature and beam current density. In addition, for the first time angle-resolved energy distributions of electron desorbed K and Cl atoms were measured using mass-analyzed time of flight techniques. For temperatures higher than about 100°C, a near-stoichiometric surface composition was obtained and a significant non-thermal component was observed in the kinetic energy distributions of Cl atoms emitted normal to the (100) surface. These results can be interpreted in terms of new concepts regarding the excitonic mechanism of electron stimulated desorption (ESD).
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