Hello, I'm trying to understand photon shielding parameters such as mass attenuation coefficients (MAC's) and effective atomic numbers (Zeff's).

I would like to ask how to calculate for total electronic cross sections (σe) given only the MAC of compounds. I noticed that the formulas given in literatures need individual mass attenuation coefficients of each element. But some reported the σe using only the MAC's of the compounds or mixtures obtained in experiments. Wouldn't they require the MAC's for each element? If no, how can it be done?


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