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- W2182654846 abstract "Large NaI detectors are commonly used in gamma measurement systems where nuclide identification and quantification is desired. These systems are used to measure people, soil, drums, boxes, animals, and other things. For quantification, an efficiency calibration must be performed, which becomes increasingly difficult as the sources become large and complicated. Mathematical techniques can be quite useful here, if they are easy enough to use, and accurate enough for the application. A series of experiments was performed to show how accurately the efficiency of large (3”x5”x16”) rectangular NaI detectors can be computed with techniques that could be implemented within the commercially available ISOCS mathematical efficiency calibration software. This software assumes that the detector response function is cylindrically symmetric, which certainly isn’t the case here. But, perhaps it is good enough for the applications for which these large rectangular detectors are commonly used. A series of mathematical experiments was performed comparing a normal 3”x5”x16” NaI detector with an optimized cylindrical NaI detector. The comparison was done at three different energies: 100 keV, 500 keV and 2000 keV. The first test was done at 172 points from 1 cm to 10 m distance and radially out to 100 meters. The second test was done for a series of discs, and the third test was done for a series of lines. The final test was done to simulate a person standing in a common whole body counter. The tests revealed that if 20% accuracy is acceptable, most normal counting situations can be adequately calibrated using this equivalent detector." @default.
- W2182654846 created "2016-06-24" @default.
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- W2182654846 date "2005-01-01" @default.
- W2182654846 modified "2023-09-26" @default.
- W2182654846 title "AN INVESTIGATION INTO THE USEFULNESS OF THE ISOCS MATHEMATICAL EFFICIENCY CALIBRATION FOR LARGE RECTANGULAR 3x5x16 NAI DETECTORS" @default.
- W2182654846 hasPublicationYear "2005" @default.
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