Transition Probabilities and Overlap-Covalency Effects in the X-Ray Photoemission Spectra of Transition-Metal Compounds:ReO3

Differences in photoelectric transition probabilities have an important effect on the interpretation of x-ray photoemission spectra of transition-metal compounds with pronounced overlap-covalency effects. It is shown that the apparent discrepancy between the x-ray-photoemission valence-band data for ${\mathrm{ReO}}_3$ and the theoretical density-of-states curve is resolved if one considers only the $5d$ component of the density of states.