Abstract
Total electron emission yields for impact of H+,H2+, C+, N+, O+ and Ar+ions (impact energy 2–10 keV) on clean highly orientedpyrolytic graphite (HOPG) have been measured. An enhancement inthe electron yield of more than a factor of 2 is found whencomparing results for differently oriented HOPG surfaces(orientation of the graphite layers with respect to the surface).By analyzing these data we elucidate the influence of electrontransport on kinetic electron emission and derivedirection-dependent mean escape depths for low-energy electrons.
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