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![[Figure 4]](vy5047fig4mag.jpg)
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Figure 4
(a) Comparison of intensities between Lα1, Lβ2 and VtC lines measured from the same sample using Si(444) and Si(555) crystal analysers. (b) VtC spectra taken from concentrated WO3, WO2, WC and W2C pellets in one-colour mode. The spectra have been normalized to the height of the core-to-core Lβ2 line after background subtraction. (c) Proposed emission diagram indicating possible origins of the VtC emission lines. The blue arrow indicates the X-ray absorption process. (d, e) Simulated DOS and ligand–metal orbital overlap for WO2, respectively. These preliminary calculations aid in the identification of novel emission lines (black line). Comparison with the DOS allows the measured features labelled A, B and C to be assigned to 5s (red), 4f (yellow) and 5d (purple) occupied states, respectively. As expected, panel (e) indicates a significant overlap with ligand orbitals in the valence region (C), whereas no pronounced peaks or orbital overlap are observed in the 5s and 4f regions (A and B). |
![[Figure 4]](vy5047fig4.jpg)
 | JOURNAL OF SYNCHROTRON RADIATION |
ISSN: 1600-5775
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