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To detect bombs that may be smuggled into airplanes , the Federal Aviation Administration (FAA) will soon require all major airports in the United States to install thermal neutrons analysers . The thermal neutron analyser will bombared baggage with low-energy neutrons , converting some of the nitrogen -14 nuclei to nitrogen -15 , with simultaneous emission of gamma rays . Because nitrogen content is usually high in explosive , detection of a high dosage of gamma rays will suggest that a bomb may be present . The sensitivity of the neutral activation analysis depends on the : |
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Answer» neutron flux available for IRRADIATION |
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