Abstract
The influence of solid surfaces on the emission of low-energy convoy electrons (8 eV<or=Ee<or=13 eV) from different target materials (C, Al, Cu, Ag, Sm, Gd and Au) after Kr+ impact (1.4 MeV<or=Ep<or=2.2 MeV) has been studied for the first time under ultrahigh-vacuum conditions. It is found that the convoy electron yield increases with decreasing residual surface coverage if the surface is cleaned by dynamic sputtering. The convoy electron yield reaches a saturation value which depends on the work function of the target; the convoy electron yield increases with decreasing work function. This indicates that the transmission of convoy electrons is influenced by both surface contamination and the surface potential barrier.
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