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Attenuation coefficient

1. (Science: radiobiology) Compton: The fractional number of photons removed from a beam of radiation per unit thickness of material through which it is passing as a result of compton effect interactions.

2. Linear: The fractional number of photons removed from a beam of radiation per unit thickness of material through which it is passing due to all absorption and scattering processes.

3. Pair Production: That fractional decrease in the intensity of a beam of ionising radiation due to pair production in a medium through which it passes.

4. Photoelectric Effect: That fractional decrease in the intensity of a beam of ionising radiation due to photoelectric effect in a medium through which it passes.