Abstract
Ultra-violet photoelectron spectra are reported for C, CO and N2, and mixtures of these, adsorbed on W(100) at room temperature. The results have been compared with simultaneous flash desorption and work function measurements, and with known LEED data for the same adsorption systems. Sequential removal of the β-desorption states of N2 and CO results in marked changes in the photoelectron spectrum, demonstrating considerable surface rearrangement during the temperature flash. Comparison of the spectra of the c(2 × 2) adsorbate structures of C, CO and N2, and also of higher coverages, including mixtures, suggests that the adsorbate spectra are determined more by the structure of the adsorbed layer than by its chemical nature.
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