The response of photographic emulsions to fast neutrons has been studied by direct measurements at two neutron energies and by exposure to high- energy charged particles. Dose response was significantly less for neutrons than for gamma rays and decreased progressively with decreasing neutron energy. Increased neutron sensitivity was obtained by use of organic scintillators as intensifying screens in conjunction with film. Neutron radiographs at two different energies were taken with step wedges made of Al, Cu, Pb and plastic. Radiographs were taken behind 2, 4, 6 and 8 inches of lead. Loss of photographic resolution from gamma rays produced in the test sample and by thermal neutron interactions is discussed.
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E. Tochilin (1965) studied this question.
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