Application of CZT detectors in nuclear materials safeguards

Details Application of CZT detectors in nuclear materials safeguards Application of CZT detectors in nuclear materials safeguards

Jul 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998spie.3446..204r&link_type=abstract

Proc. SPIE Vol. 3446, p. 204-209, Hard X-Ray and Gamma-Ray Detector Physics and Applications, F. Patrick Doty; Richard B. Hoover

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High-resolution, gamma- and x-ray spectrometry are used routinely in nuclear materials safeguards verification measurements. These measurements are mostly performed with high-purity germanium detectors, which require cooling at liquid-nitrogen temperatures, thus limiting their utility in field and unattended safeguards measurement applications. Sodium iodide (NaI) scintillation detectors do not require cooling but their energy resolution (10% at 122 keV) is insufficient for many verification measurements. Semiconductor detectors that operate at room temperatures, such as cadmium-zinc-telluride (CZT) detectors, with energy resolution performance reaching 2.0% at 122 keV may be used for certain safeguards verification applications. We have developed hardware to utilize CZT detectors in x- and gamma- ray measurement systems and software to apply such a system in measuring (superscript 235)U enrichment for safeguards verification purposes. The paper reports on the CZT detector-based measurement system and measurement results obtained with it. The paper also discusses work on additional improvements to broaden the applications of the system.

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