L-3 and M-4,M-5 absorption edges of intermediate valent cerium unravelled by resonant photoemission and resonant Auger spectroscopy

In CeRh3 and Ce7Rh3 compounds, strong resonant effects are observed in the Ce 3d and 4d photoemission spectra at the Ce L-3 and M-4,M-5 absorption edg es respectively. These resonances show unambiguously that interference effe cts exist in core level spectroscopies. In the CeRh3 mixed valent compound, the resonances of photoemission peaks corresponding to 4f(0), 4f(1) and 4f (2) final state character occur at different photon energies, making it pos sible to unravel the X-ray absorption profiles. Moreover, resonant L3M4,5N4 ,5 Raman Auger lines are observed up to 10 eV above the L-3 absorption edge , showing the strong localized character of the core excited state.