✦ LIBER ✦

Surface excitation parameters of low-energy electrons crossing solid surfaces

✍ Scribed by Kwei, C. M.; Wang, C. Y.; Tung, C. J.

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 424 KB
Volume: 26
Category: Article
ISSN: 0142-2421
DOI: 10.1002/(sici)1096-9918(199808)26:9<682::aid-sia415>3.0.co;2-7

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✦ Synopsis

The surface excitation parameter, which describes the inÑuence of surface excitations by electrons for the vacuum side in electron spectroscopies, has been calculated for electrons of 200-2000 eV energies crossing surfaces of Cu, Ag, Au, Fe, Pd, Ni, MgO and These calculations were performed for both incident and escaping electrons by SiO 2 . the use of dielectric response theory. Spatially varying di †erential inverse mean free paths for surface excitations as a function of electron distance from the surface were found. The results showed that small di †erences existed in the surface excitation parameter among di †erent metals but large di †erences occurred between metals and semiconductors or insulators. Calculated surface excitation parameters were Ðtted very well to a simple formula, i.e.

where is the surface excitation parameter and E is the electron energy.

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