A flux of photons passing through a condensed medium drives with it a flux of recoil electrons, continually generated by Compton and photoelectric processes and continually brought to rest by the stopping power of the medium. We formulate an analytical description of the magnitude and angular distribution of this electron flux in unbounded media. Numerical results for net, forward, and back-directed current densities are presented for a large set of elements and compounds and for photon energies from 10 keV to 20 MeV.
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MacCallum et al. (1973) studied this question.
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