Inelastic Scattering of X-Rays with Very High Energy Resolution

Inelastic scattering of X-rays with very high energyresolution has finally become possible thanks to a newgeneration of high-intensity X-ray sources.This development marks the end to the traditional beliefthat low energy excitations like lattice vibrations cannotbe resolved directly with X-rays: Inelastic scatteringexperiments allow to observe directly the small energyshifts of the phot...