40.81-eV photoelectron study of Cu, Ag, and Au surfaces

High-resolution photoelectron spectra from clean surfaces of Cu, Ag, and Au have been obtained using He I and He II radiation. The spectra have been corrected for instrumental transmission efficiency effects and have been deconvoluted to take account of finite instrumental linewidth. It has been established that 40.81-eV spectra do not contain large numbers of inelastically scattered electrons with kinetic energies $\mathbf{\gtrsim }20$ eV and that the deconvoluted spectra reveal a number of features not previously reported. The present results have been compared with x-ray photoelectron spectroscopic measurements, with lower-energy photoelectron spectroscopic results, and with selected theoretical band-structure determinations. Preliminary data have been obtained relating to the adsorption kinetics of residual vacuum gases as a function of sample temperature in the range 30-300 °C.