Crystal Structure and Ionic Vibrations
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We show that how elastic the scattering of external particles (usually photons or neutrons) by a crystal allows us to determine experimentally the lattice structure. We also show that the inelastic scattering of thermal neutrons due to phonon absorption or emission reveals the phononic dispersion relation; a comparison with the corresponding theoretical results is presented. Explicit expressions for these elastic and inelastic cross-sections are obtained.
KeywordsElastic Constant Bulk Modulus Inelastic Scattering Periodic System Reciprocal Lattice
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- See the book by Ashcroft and Mermin [SS75] Chaps. 22, 23, 24, and Appendices L, M, N and the book by Kittel [SS74], Chap. 2.Google Scholar