Abstract
Changes in secondary emission during the adsorption of lead on copper (111) and (100) surfaces, followed by monitoring the crystal current (SEECC technique), are compared with changes in the work function as well as with variations in the Auger signals. The work function variation for the (100) face exhibits a sudden change that may be due to a transition of the adsorbate from a 1D (atomic chain) type of structure to a 2D structure. The secondary emission changes are not explained entirely by the work function variations; there are also effects that are correlated with changes in adsorbate structure and which are probably due to diffraction at the surface.
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