UV-SPECTROSCOPY STUDY OF THE CE7RH3 EMPTY AND FILLED VALENCE STATES

We present an UV-photoemission and inverse-photoemission investigation on the valence states of Ce7Rh3. The data have been compared with tho se of the isostructural Lu7Rh3 where the 4f signal is absent in the va lence region. The d-sensitive spectra show a strong similarity between the d-like states for the two compounds. This circumstances has been interpreted in terms of balancing between variations of nearest-neighb or distances and wave-function radial extensions, and exploited to ext ract the whole 4f spectral function from the f-sensitive Ce7Rh3 spectr a both below and above the Fermi energy. These results, together with results from Ce 3d core-level spectroscopy, indicate that Ce7Rh3 has a small hybridization strength (similar to that of gamma-Ce) and a 4f o ccupation (n(f)) close to 1.