We have performed the high-resolution Ce 3d--4f resonance photoemission study of a considerably hybridized CeNi with the Kondo temperature of \sim 150 K. The tail of the Kondo-resonance peak is predominantly observed in the bulk Ce 4f photoemission spectra, where its spin--orbit partner is suppressed compared with the so far reported surface-sensitive Ce 4d--4f resonance spectrum. Our results show that the bulk 4f electronic states are essentially understood by the single impurity Anderson model.

PACS numbers: 79.60.Bm, 75.20.Hr, 71.27.+a, 71.20.Eh