STUDY OF YVO4 BY APPEARANCE POTENTIAL SPECTROSCOPY

The luminescent orthovanadate compound YVO4 has been studied by soft X-ray Appearance Potential Spectroscopy. Vanadium L2.3 APS spectra, which give information about unoccupied electron states, have been interpreted in conjunction with existing experimental data on soft X-ray emission and with cluster model calculations. The main features of the APS spectrum of vanadium in YVO4 as compared with the APS spectrum of pure vanadium metal are discussed, as well as the extent to which the vanadium L2.3 APS-signal in YVO4 can be explained by the energy level diagram given by a non-self-consistent calculation in a VO43- cluster model. © 1979.