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Diffuse Scattering - Spallation Neutron Source - Oak Ridge National ...

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X-rays scattering measurements infer phonon<br />

dispersion from quasi-elastic scattering<br />

• Phonon energies milli-eV<br />

• Synchrotron based high-E<br />

resolution X-ray<br />

beamlines can measure<br />

phonons in some cases<br />

• Emerging area for highbrilliance<br />

x-ray sources<br />

Phonon spectrum gives natural vibration frequencies in<br />

different crystal directions!

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