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LLNL scientists have developed a simple neutron detection technique that can discriminate fissile material from non-fissile material. A low cost digital data acquisition unit collects data at high rates and processes large volumes of data in real-time. This technique functions in a passive mode much like a standard portal monitor. There are options for converting the technique to an active…

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The invention utilizes the statistical nature of radiation transport as well as modern processing techniques to implement a physics-based, sequential statistical processor. By this we mean that instead of accumulating a pulse-height spectrum as is done in many other systems, each photon is processed individually upon arrival and then discarded. As each photon arrives, a decision is…

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LLNL is developing a highly-sensitive compact Compton imaging technology with excellent energy resolution, good imaging performance and large field-of-view. This system is built of large-volume and high-resolution Si(Li) and HPGe detectors. These detectors are built in double-sided strip configurations providing excellent three-dimensional position resolution. The system can measure individual…

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LLNL scientists have developed a radiation detection network that uses solid state detectors (e.g. CZT) coupled to cellular telephones. Detection of gamma and/or neutron radiation is possible with high sensitivity. A network of cellular phones GPS locations and their detection data can be correlated for real-time analysis of potential nuclear threats.