FIELD: investigating or analyzing materials.
SUBSTANCE: method comprises generating fast neutron pulse, forming slow neutron flux from it, irradiating the object to be checked by the pulse flux of slow neutrons, and recording the instantaneous fast neutrons of fission, which indicates the presence of fission materials in the object. The fast neutrons are generated by irradiating a target-converter by the pulse flux of electromagnetic radiation whose energy exceeds the energy threshold of photon-neutron reaction.
EFFECT: enhanced efficiency.
5 cl, 3 dwg
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