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Material Properties Tables

X-Ray Linear and Mass Attenuation Coefficients

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Mass Attenuation Coefficient
Tables and graphs of the mass attenuation coefficients at photon energies from 1 keV to 20 MeV for all of the elements Z = 1 to 92, and for compounds and mixtures of radiological interest are available at the National Institute for Standards and Technology website.


Converting a Mass Attenuation Coefficient to a Linear Attenuation Coefficient
Since a linear attenuation coefficient (m) is dependent on the density of a material, the mass attenuation coefficient is often reported for convenience.  The mass attenuation coefficient is simply the linear attenuation coefficient divided by the material density.  This action will produce a value that is constant for a particular element or compound. 

To convert a mass attenuation coefficient (m/r) to a linear attenuation coefficient (m), simply multiply it by the density (r) of the material.

Conversion

For more information on mass and linear attenuation coefficients see the material in the NDT on-line section.