Abstract
The valence-band photoemission of the (010) surfaces of CeNi single crystals has been observed. The features occurring in angle-resolved normal-emission spectra do not show an appreciable amount of dispersion. The energy distribution curves are squeezed and narrower than those suggested by an existing energy-band calculation. Resonant photoemission has been observed both near the 3p core electron excitation threshold of Ni and the 4d threshold of Ce. An aspect of the super-Coster-Kronig final state with a post-collision interaction is found near the onset of the resonance in the two-hole bound-state satellite. In addition to the two-peak profile in the overall spectral aspect of the 4f spectrum, two additional features are resolved. The origin of these features is discussed. The ratio of Fano's q parameters between the 3p-3d resonance in Ni ions and the 4d-4f resonance in Ce ions agrees with a result of a simple theoretical analysis.
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