High resolution Ce 4d --> 4f resonance photoemission study was done fo
r CeRu2Si2. The Ce 4f spectrum has shown two prominent peaks around 0.
3 and 2.5 eV. The 0.3 eV peak has clearly shown an additional structur
e closer to the Fermi level, whose intensity decreases at higher tempe
ratures. This intensity reduction is ascribed to the tail of the Kondo
resonance peak. (C) 1997 Elsevier Science Ltd.