X-Ray Compton-Raman Scattering from Atomic Inner-Shell Electrons

Inelastic scattering of ${}_{}{}^{241}{}_{}{}^{}\mathrm{Am}$ 59.57-keV $\gamma$ rays from Cu and Fe was measured in coincidence with the $K$-fluorescence x rays. The spectrum due to the scattering by the $K$-shell electrons shows the coexistence of a Compton-type and a Raman-type scattering. Double-photon Thomson-type scattering is also identified, which is weaker than the usual Compton scattering by a factor of about 4 × ${10}^{-3\mathrm{}}$.