High-Resolution Compton-Suppressed CZT Detector for Fission Products Identification

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Room temperature semiconductor CdZnTe (CZT) detectors are currently limited to total detector volumes of 1-2 cm3, which is dictated by the poor charge transport characteristics. Because of this size limitation one of the problems in accurately determining isotope identification is the enormous background from the Compton scattering events. Eliminating this background will not only increase the sensitivity and accuracy of measurements but also help us to resolve peaks buried under the background and peaks in close vicinity of others. We are currently developing a fission products detection system based on the Compton-suppressed CZT detector. In this application, the detection system ... continued below

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Aryaeinejd, R.; Hartwell, J. K. & Scates, Wade W. October 1, 2004.

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Room temperature semiconductor CdZnTe (CZT) detectors are currently limited to total detector volumes of 1-2 cm3, which is dictated by the poor charge transport characteristics. Because of this size limitation one of the problems in accurately determining isotope identification is the enormous background from the Compton scattering events. Eliminating this background will not only increase the sensitivity and accuracy of measurements but also help us to resolve peaks buried under the background and peaks in close vicinity of others. We are currently developing a fission products detection system based on the Compton-suppressed CZT detector. In this application, the detection system is required to operate in high radiation fields. Therefore, a small 10x10x5 mm3 CZT detector is placed inside the center of a well-shielded 3" in diameter by 3" long Nal detector. So far we have been able to successfully reduce the Compton background by a factor of 5.4 for a 137Cs spectrum. This reduction of background will definitely enhance the quality of the gamma-ray spectrum in the information-rich energy range below 1 MeV, which consequently increases the detection sensitivity. In this work, we will discuss the performance of this detection system as well as its applications.

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  • IEEE Nuclear Science Symposium Conference,Rome, Italy,10/16/2004,10/22/2004

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  • Report No.: INEEL/CON-04-02345
  • Grant Number: DE-AC07-99ID-13727
  • Office of Scientific & Technical Information Report Number: 910864
  • Archival Resource Key: ark:/67531/metadc890434

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  • October 1, 2004

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  • Sept. 22, 2016, 2:13 a.m.

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  • Nov. 29, 2016, 12:41 p.m.

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Aryaeinejd, R.; Hartwell, J. K. & Scates, Wade W. High-Resolution Compton-Suppressed CZT Detector for Fission Products Identification, article, October 1, 2004; [Idaho Falls, Idaho]. (digital.library.unt.edu/ark:/67531/metadc890434/: accessed December 11, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.