ADSORBATE-INDUCED ANGLE AVERAGING OF CU(111) PHOTOEMISSION SPECTRA

The adsorption of Cs on Cu(111) produces major changes in the Cu 3d-band part of angle-resolved photoelectron spectra recorded at ω=16.8̂ and̂ 21.2 eV. The angular dependence is much reduced and the spectra are quite similar to those obtained from polycrystalline Cu. We associate this behavior with a strong incoherent scattering by the adsorbate. © 1979 The American Physical Society.