Valence-to-core X-ray emission spectroscopy of Ti, TiO, and TiO2 by means of a double full-cylinder crystal von Hamos spectrometer

We present valence-to-core X-ray emission spectroscopy of Ti, TiO, and TiO2 by means of a double crystal von Hamos spectrometer based on full-cylinder highly annealed pyrolytic graphite mosaic crystals. We demonstrate that, using a double crystal configuration, an energy resolution of E/Delta E approximate to 2,700 can be achieved in a compact setup using cylindrically curved optics with a radius of curvature of 50 mm. The stated energy resolution proved to be high enough to identify and determine chemical shifts of the K beta(2,5) and K beta '' emission lines of both oxides. The experimental results are supported by calculations with the ab initio package OCEAN and compared with literature values.