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Figure 10
Two consecutive XANES spectra on a GeO2 sample and related difference (multiplied by a factor of 100) collected at the Ge K-edge with Si(111) crystals. Data acquisition time was 3 s per point and the energy step on the edge was 0.5 eV. The choice of this compound comes from the coupling of two facts: a limited core-hole width (1.96 eV; Krause & Oliver, 1979BB19) and a relatively small Bragg angle (10°) that result in a steep edge ideal for energy stability testing (the local derivative D = [\delta\mu/\delta\Theta_{\rm{Bragg}}] on a normalized Δμ = 1 spectrum is about 300 degree−1).

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 26| Part 2| March 2019| Pages 551-558
https://doi.org/10.1107/S160057751801843X
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