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Glossary terms about Absorption

X-ray absorption is most commonly due to the photo-electric effect. An X-ray photon is absorbed by an atom and a photo-electron is emitted.

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3 pages mention Absorption

Quantitative EDS X-ray microanalysis using SEM
Firstly, they are low energy X rays subject to strong absorption by the specimen. 
The photoelectric effect
InteractionEnergy absorption 
X-ray intensity
Not all of the X-rays that are generated in the sample by the primary electron beam are emitted from the sample.