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The Compton scattering is a relativistic scattering of a photon by a free electron and is incoherent and inelastic. There are degrees of freedom in each scattering event associated with the atomic electron, and thus the Compton scattering of an X-ray is incoherent.
The measured X-ray line shape P(E) as a function of the analyzed photon energy E, can be given by the Hyperment function,
P(E) = S(E) + D(E) + G(E) ------------------- [3816]
where,
S(E) -- The Compton scattering of the photons within the detector.
D(E) -- The incomplete charge collection in the dead layer of the detector.
G(E) -- The major Gaussian peak.
Table 3816 shows that electrons interact with 1 electron, many electrons, 1 nucleus, and many nuclei in solids.
Table 3816. Effects of interactions of electrons in solids.
| |
Interaction with electron(s) |
Interaction with nucleus/nuclei |
| |
1 electron |
Many electrons |
1 nucleus |
Many nuclei |
| Scattering type |
Inelastic |
Inelastic |
Quasi-elastic |
Elastic |
Inelastic |
| Scattering effect |
Electron Compton effect; electron excitation (from 50 eV to a few keV: EDS and EELS) |
Plasmon excitation (< 50 eV, ~100 nm TEM specimen); Cerenkov effect |
Rutherford scattering; phonon scattering (< 1 eV, heat) |
Bragg scattering |
Bremsstrahlung |
Note that the Compton scattering generates a background intensity in X-ray diffraction patterns.
|
