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Attenuation coefficient
m
•
Each photon interaction process it’s represented by its own
attenuation coefficient (
e,t,s,k,z
). The sum of coefficients
gives
m
•
Photoelectric absorption, Compton effect and Pair
production are dominant in the energy range of interest (0.1
– 100 MeV)
m
e
+
t
+
s
+
k
+
z
Photonuclear interactions
(z)
Elastic scattering
(e)
Compton effect
(s)
Photoelectric effect
(t)
Pair production
(k)