The emission of high-energy secondary electrons from thin targets of low atomic number has been calculated. The targets are assumed to be bombarded with 25-MeV electrons, 600-kVp x rays, and prompt fission gamma radiation. The results give maximum efficiency of high-energy secondary electron emission of 8% for 25-MeV electrons, 0.30% for prompt fission gamma radiation, and 0.05% for 600-kVp x rays.
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Sawyer et al. (1964) studied this question.
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