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Attenuation coefficients
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The attenuation coefficient measures the degree of attenuation of a gamma-ray beam. 

The calculation of gamma-ray attenuation by matter is important for:

  • assessing the effectiveness of shielding, and
  • to correct for self absorption within sources.

Both calculations require the attenuation coefficient (m)

The attenuation coefficient is the summation of:

  • the photoelectric absorption coefficient;
  • the Compton scattering coefficient;
  • the pair production coefficient, and
  • other scattering coefficients.

This section contains the following topics:

Linear attenuation
Build up factor
Attenuation graphs


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