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Glossary terms about **Mass Absorption Coefficients**

- Mass Absorption Coefficients (MAC)
- A matrix of numbers reflecting the absorption of a particular X-ray line (the emitter) by all the other elements in the periodic table.

1 page mentions **Mass Absorption Coefficients**

- Quantitative EDS X-ray microanalysis using SEM
- Mass absorption coefficients are stored as a matrix of numbers of absorption of a particular X-ray line (the emitter) by an absorber: For example, a portion of the MAC matrix for Kα X-rays for Z = 23 to 29 is shown below.