| 摘要 |
A multi-stage process detects and identifies radiation, explosives, and s pecial materials within a shipping container. The process utilizes radiation sensors configured as nodes on a distributed network. The process collects radiation data from the nodes. The radiation data is associated with the con tainer and its contents. The collected radiation data is dynamically adjuste d according to dynamically changing background radiation data, such as relat ing to water, land, air, ground, and other structures. The process compares collected and adjusted radiation data to spectral images representing isotop es to identify one or more isotopes present. Identified isotopes are corresp onded to possible materials that they represent. The possible materials are compared with the manifest of the container to confirm the identity of mater ials contained in the container or to detect and/or identify unauthorized ma terials in the container. A neutron pulse device could be used to identify s hielded materials, explosives, and other types of materials.
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