1. Physical and mathematical principles
1.1 Attenuation of X-rays by matter
When a parallel beam of monochromatic X-rays of intensity I passes through a quantity of material of infinitesimal thickness dx at normal incidence, the transmitted beam is attenuated by the intensity dI :
with :
- μ :
-
linear absorption coefficient.
This leads to Beer's law giving the intensity transmitted by a thickness x of the material:...
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