MULTIELECTRON EXCITATIONS IN THE K-EDGE X-RAY-ABSORPTION NEAR-EDGE SPECTRA OF V, CR, AND MN 3D0 COMPOUNDS WITH TETRAHEDRAL COORDINATION

Multielectron excitations involving metal deep 1s and shallow 3p core levels have been identified in the x-ray-absorption spectra in the range 50-60 eV above the K edge of transition-metal ions V, Cr, and Mn with tetrahedral coordination geometry. The many-body transitions have been found after subtraction of the dominant one-electron transitions to continuum states giving the x-ray-absorption near-edge structure. The presence of many-body excitations involving valence electrons has been found at approximately 7 eV above threshold. The energy positions are in good agreement with calculated excitation energies for the many-body configurations, where the two excited electrons are in the unoccupied molecular t2* orbital. Experimental comparison of the intensities of corresponding many-body satellites between the Cr2p x-ray photoelectron spectrum and Cr K-edge absorption spectrum is reported for K2CrO4.