Abstract
A well-known final state effect in photoemission is that of the “shake-up” satellite in core level and valence band spectra from Pd in the bulk metals. The satellite is explained in terms of the existence of two Pd final state configurations, 4d 95s 1 and 4d 105s 2. The present paper is a preliminary report of studies of the suppression of the shake-up satellite in surface alloys of Pd with the “sp metals”, In and Sb, on Pd(1 1 1), whose surface structure was determined as being (√3 × √3)R30° from LEED and X-ray photoelectron diffraction (XPD). Although satellite suppression has been reported for bulk alloys, no such report has been made for a metallic surface alloy system. From the satellite suppression and the related spectra asymmetry reduction, as well as the small binding energy shifts, we are able to interpret the results in terms of valence band splitting.
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