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![[Figure 7]](ba5150fig7mag.jpg)
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Figure 7
Primary X-ray interaction processes with the atoms of the crystal and solvent. (a) Elastic (Thomson, coherent) scattering. The waves are phase-shifted by 180° on scattering and add vectorially to give the diffraction pattern. (b) Compton (incoherent) scattering. The X-ray transfers some energy to an atomic electron and thus has lower energy (higher wavelength) after the interaction. Energy is lost in the crystal, contributing to the absorbed dose. (c) Photoelectric absorption. The X-ray transfers all its energy to an atomic electron, which is then ejected and can give rise to the ionization of up to 500 other atoms. The excited atom can then emit a characteristic X-ray or an Auger electron to return to its ground state. |
![[Figure 7]](ba5150fig7.jpg)
 | STRUCTURAL BIOLOGY |
ISSN: 2059-7983
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