Video 7.1
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Concept development
How is inelastic scattering different than elastic scattering? Why is data analysis more challenging?
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In the image above, we see an incident X-ray with wavevector k (equal to 2 reciprocal lattice vectors in length), an exit wavevector k', and 2 phonons, q1 and q2. All are drawn with respect to a common reciprocal lattice origin.
Does delta k + q1 or delta k + q2 get us to a reciprocal lattice point? If so, which one?
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Could either phonon be involved if we consider both creation and absorption in the inelastic process?
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Why is the length of k' approximately the same as k? Would you expect the same behavior for inelastic scattering from neutrons or visible light?
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