| 摘要 |
A system to detect low-level nuclear devices concealed in vehicles on public roadways. Non-Poissonian background fluctuations occur in a single radiation detector, in a period of time small compared to the passage of a radioactive source in front of a detector. The background fluctuations do not correlate from detector to detector or time slice to time slice. A source passing in front of the detector causes fluctuations in both detectors; and the fluctuations continue during the time period the source is near the detector. Statistical analytic processes are used to discern the differences between background fluctuations and source induced fluctuations in order to obtain a high-sensitivity, low false alarm hit detection system
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