Abstract
Measurement of total scattering, which includes both the Bragg peaks and the diffuse scattering, can give information about the short-range structure of materials. This is quite useful for understanding the structure of liquid, glasses and amorphous materials. On the other hand, since thermal neutrons used for scattering experiments have energies in the meV range, which is close to the phonon energy, scattering by a phonon causes a fractional change in the neutron energy. This allows an accurate measurement of the energy change and makes neutrons an ideal tool for measuring phonon dispersion. Several experimental methods and examples are described.
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