Angle resolved photoemission and experimental band structure of Ag

Angle resolved energy distribution curves of photoelectrons emitted from (100), (110) and (111) faces of Ag using unpolarized noble gas resonance radiation have been measured. From off-normal-emission spectra the final-state dispersion relations were determined. They show deviations from the calculated bands and from the free-electron parabola. Using the direct-transition model the dispersion of the occupied valence bands along the major symmetry directrions ΓX, ΓKX and ΓL have been determined. Slight deviations up to .4eV with respect to Christenen's theoretical band structure were found.