Abstract
We extend our methods for calculating the nonlocal corrections to the Fresnel optics of jellium models so that they may be applied above the threshold for bulk-plasmon excitation. The formalism is illustrated by several model calculations for different surface potential-energy barriers and different approximations for the mean field felt by the responding electrons. Once one has separated out the creation amplitude for the bulk plasmon, the remaining structure does not show strong variation between theoretical models. This conclusion applies to both induced densities and d parameters. We show that the results are consistent with the sum rules for the d's.
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