The work is devoted to illegal materials detection via tagged neutron method (TNM). The detection of hazardous substances is based on recording of gamma radiation from a neutron-irradiated object and analysis of its elemental composition. As against other neutron radiation methods the TNM enables to obtain 3D distribution of elements in the inspected area. The results of experimental part of the research show operational capabilities (probabilities of missing and false alarm) of a portable TNM inspection system when inspecting small hand-luggage-type objects.
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