Hand-held radio-isotope detection and identification instrument

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Description

An instrument combining an array of Cadmium-Zinc-Telluride (CZT) detectors, a NaI scintillator, and two {sup 3}He neutron detectors has been constructed. The instrument uses the CZT array to identify radioactive materials. As an example of this application, the 3 {sigma} Minimum Detectable Activity for the 375 keV peak of {sup 238}Pu is less than 1 gram at a distance of 20 cm for a 100-second counting time. The 2 x 2 NaI scintillator has a dual purpose. First, it is used to supplement the CZT array for identification of high-energy gammas, such as those from {sup 60}Co. Second, the principle ... continued below

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1 pages

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Quam, W. M. April 30, 2000.

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Description

An instrument combining an array of Cadmium-Zinc-Telluride (CZT) detectors, a NaI scintillator, and two {sup 3}He neutron detectors has been constructed. The instrument uses the CZT array to identify radioactive materials. As an example of this application, the 3 {sigma} Minimum Detectable Activity for the 375 keV peak of {sup 238}Pu is less than 1 gram at a distance of 20 cm for a 100-second counting time. The 2 x 2 NaI scintillator has a dual purpose. First, it is used to supplement the CZT array for identification of high-energy gammas, such as those from {sup 60}Co. Second, the principle use of the NaI scintillator is to help search for radioactive material and to find a suitable measurement location on a suspect package for the CZT-based isotope-identification measurement. This detector also produces energy-corrected exposure-rate data. The {sup 3}He neutron detectors provide an additional confirmation of the presence of some plutonium isotopes. The neutron sensitivity is 90 counts per second at 20 cm from a moderated {sup 252}Cf neutron source.

Physical Description

1 pages

Notes

INIS; OSTI as DE00758112

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  • American Nuclear Society Topical Conference, 5th International Conference on Methods and Applications of Radioanalytical Chemistry (MARC V), Kailua-Kona, HI (US), 04/09/2000--04/14/2000

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  • Report No.: DOE/NV/11718--376-ABS
  • Grant Number: AC08-96NV11718
  • Office of Scientific & Technical Information Report Number: 758112
  • Archival Resource Key: ark:/67531/metadc708540

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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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  • April 30, 2000

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • Feb. 15, 2016, 11:09 a.m.

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Quam, W. M. Hand-held radio-isotope detection and identification instrument, article, April 30, 2000; Nevada. (digital.library.unt.edu/ark:/67531/metadc708540/: accessed June 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.