Comparison of CdTe and CdZnTe Detectors for Field Determination of Uranium Isotopic Enrichments

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A performance comparison of a CdTe and a CdZnTe detector when exposed to uranium samples of various isotopic enrichments has been performed. These high-resolution detectors can assist in the rapid determination of uranium isotopic content of illicit material. Spectra were recorded from these room temperature semiconductor detectors with a portable multi-channel analyzer, both in the laboratory and in a field environment. Both detectors were operated below ambient temperature using the vendor supplied thermoelectric coolers. Both detectors had nominally the same active volume (18 mm3 for the CdZnTe and 25 mm3 for the CdTe detector) and resolution. Spectra of samples of ... continued below

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Hofstetter, KJ January 23, 2004.

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A performance comparison of a CdTe and a CdZnTe detector when exposed to uranium samples of various isotopic enrichments has been performed. These high-resolution detectors can assist in the rapid determination of uranium isotopic content of illicit material. Spectra were recorded from these room temperature semiconductor detectors with a portable multi-channel analyzer, both in the laboratory and in a field environment. Both detectors were operated below ambient temperature using the vendor supplied thermoelectric coolers. Both detectors had nominally the same active volume (18 mm3 for the CdZnTe and 25 mm3 for the CdTe detector) and resolution. Spectra of samples of known isotopic content were recorded at fixed geometries. An evaluation of potential signature g rays for the detection of enriched uranium was completed. Operational advantages and disadvantages of each detector are discussed. There is a need to improve the detection sensitivity during the interdiction of special nuclear materials (SNM) for increased homeland protection. It is essential to provide additional tools to first responders and law enforcement personnel for assessing nuclear and radiological threats.

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  • Marc VI, Kona, HI (US), 04/07/2004--04/11/2004

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  • Report No.: WSRC-MS-2002-00895
  • Grant Number: AC09-96SR18500
  • Office of Scientific & Technical Information Report Number: 821102
  • Archival Resource Key: ark:/67531/metadc735957

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • January 23, 2004

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  • Oct. 18, 2015, 6:40 p.m.

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  • May 5, 2016, 5:38 p.m.

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Hofstetter, KJ. Comparison of CdTe and CdZnTe Detectors for Field Determination of Uranium Isotopic Enrichments, article, January 23, 2004; South Carolina. (digital.library.unt.edu/ark:/67531/metadc735957/: accessed October 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.