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Figure 13
(a) Inelastic slice of FeSi data with T = 300 K and Ei = 70 meV along [H, H, 6] including strong, slightly inelastic features at half-integer (i.e. M) points. (b) An in-plane Q map integrated over E = [1, 5] meV, illustrating that these signals appear systematically at M points throughout the full Q volume. (c) An out-of-plane Q map integrated over E = [0, 5], revealing the origin of these spurious features; namely, Bragg peaks near the detector ends are dramatically smeared and, in this case, reach the parallel Q plane below. (d–f) Further investigation indicates that similar artifacts appear across all measured (Ei, T). For example, out-of-plane Q maps integrated over E = [0, 5] are shown for T = 10 K and Ei = 40 meV with (d) L = [−1.1, −0.9], (e) L = [−0.1, 0.1], (f) L = [0.9, 1.1]. In inelastic Γ–M slices along these Bragg peak tails, the artifacts manifest as extended, slightly inelastic signals, as shown in Figs. 9[link](e)–9[link](g).

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 59| Part 1| February 2026| Pages 248-262
https://doi.org/10.1107/S1600576725011112
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