| 摘要 |
A system and method are described for capturing and analyzing gamma rays from neutron excitation of a region in 3-space being analyzed for explosives. A processor analyzes the results, determining whether underground explosives are present in a particular region of the ground. In one embodiment, one gamma ray energy band is used to infer an amount of silicon in the region, while another indicates the combined amount of silicon and nitrogen. The concentration of nitrogen in the region is inferred and used to trigger an "explosive found" or a "no explosive found" signal. In other embodiments, the system or method uses inferences about other elemental constituents of the ground being examined, sometimes taking as input analyzes from prior scans, and providing output indicating the likelihood of the presence of explosives in the region.
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