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Figure 4
Stack plot of a collection of HERFD-XES slices following the subtraction of the Kβ background. The background, which corresponds to the stable transitions in this incident energy (Einc) range, is evident in Fig. 2(b). The signal-to-noise ratio is improved due to the elimination of electronic noise in the data (Appendix A[link]), selective use of the eight highest-resolution analyser crystals (Appendix B[link]) and the naturally suppressed intensity of the Kβ satellite. While only noise fluctuations are evident at low Einc, two distinct and prominent peaks emerge and remain evident in the substructure beyond 7280 eV. This is definitive evidence for the evolution of the satellite.

IUCrJ
Volume 12| Part 5| September 2025| Pages 548-562
ISSN: 2052-2525
https://doi.org/10.1107/S2052252525005573