The absorption length or attenuation length in x-ray scattering is the distance over which the x-ray beam is absorbed. By convention, the absorption length λ is defined as the distance into a material where the beam flux has dropped to 1/e of its incident flux.
Absorption
The absorption follows a simple Beer-Lambert law:
The attenuation coefficient (or absorption coefficient) is simply the inverse of the absorption length; ![{\displaystyle \mu =1/==Calculating==Theabsorptionlengtharisesfromtheimaginarypartofthe[[atomicscatteringfactor]],''f''<sub>2</sub>.Itiscloselyrelatedtotheabsorptioncross-section,andthemassabsorptioncoefficient.Specifically,the'''atomicphotoabsorptioncross-section'''canbecomputedvia::<math>\sigma =2r_{e}\lambda }](https://wikimedia.org/api/rest_v1/media/math/render/svg/dbdde8072ba4dc078de916b088a6cf9c8584f6a6)
See Also
