3D-RESONANT PHOTOEMISSION AND AUGER EMISSION OF CE IN CEO2

The Ce 3d-edge resonant photoelectron and Auger electron emission spec tra in CeO2 have been measured. The 4s-, 4p- and 4d-emission at off-re sonance excitations consists of two parts separated by about 13 eV, wh ich correspond to different final-state configurations. The resonantly excited spectra show the different nature of the M(45). main and sate llite photoexcitations. The satellites seem to correspond to intermedi ate states of a more extended character. For M(45)N(45)N(45) on-resona nce decay the most interesting finding (obtained by comparison with th e relevant spectra of Ce in CeCl3 and La in LaF3) is the considerable suppression of the high energy band related to the upper levels of the 4d(8)4f(n) final state configurations. Th M(45)N(45)N(45) decay in Ce O2 appears to be snore similar to the situation in metallic cerium tha n in the insulating CeCl3.