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Figure 2
A schematic view of the Ewald sphere with wavevectors of incoming beams k and outgoing beams k′, reciprocal lattice vector G, and reciprocal lattice unit vector a*. a* is rotated by an azimuthal angle ϕ and a longitudinal angle ψ from the vertical line, and is perpendicular to k when ψ = 0. In the figure, LD and TD are transverse directions of the neutron beam, and ND is the normal direction (or the direction of the neutron beam).

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 56| Part 4| August 2023| Pages 1108-1113
https://doi.org/10.1107/S1600576723005204
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