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Figure 1
Profiles of the primary diffracted intensity IH in three different three-beam interactions, −H, L, H − L. The triplets are (a) [233/\overline{4}00/2\overline{33}], (b) [545/3\overline{23}/\overline{822}] and (c) [433/0\overline{33}/\overline{4}00]. Profiles have been collected with radiation from a conventional source, λ = 0.71073 Å, and combined ω–2θ/ψ scans (series  1), synchrotron radiation, λ = 0.9434 Å, and combined ω/ψ scans (series 2), synchrotron radiation, λ = 1.0000 Å, and pure ψ scans (series 3). Intensities are given relative to the two-beam level (= 100), ψL is the signed rotation of the secondary reciprocal lattice node L from the exact three-beam point, ψL = 0. Measurements in series 2 and 3 were made with the same crystal specimen in the identical mount. Note the change in the ψL scale between plots from series 1 and those from the two series with synchrotron radiation.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 5| Part 6| November 1998| Pages 1369-1374
https://doi.org/10.1107/S0909049598006062
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