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Proceedings Paper

Cadmium-zinc-telluride crystal array spectrometer
Author(s): William M. Quam; Thomas DeVore; Harold R McHugh; Robert D Vogel; John Wesolowski
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Paper Abstract

This paper describes a gamma detector employing an array of eight cadmium-zinc-telluride (CZT) crystals configured as a high resolution gamma ray spectrometer. This detector is part of a more complex instrument that identifies the isotope, displays this information, and records the gamma spectrum. Various alarms and other operator features are incorporated in this battery operated rugged instrument. The CZT detector is the key component of this instrument and will be described in detail in this paper. We have made extensive spectral measurements of the usual laboratory gamma sources, common medical isotopes, and various Special Nuclear Materials (SNM) with this detector. Some of these data will be presented as spectra. We will also present energy resolution and detection efficiency for the basic 8-crystal array. Additional data will also be presented for a 32-crystal array. The basic 8-crystal array development was completed two years ago, and the system electronic design has been improved recently. This has resulted in significantly improved noise performance. We expect to have a much smaller detector package, using 8 crystals, in a few months. This package will use flip-chip packaging to reduce the electronics physical size by a factor of 5.

Paper Details

Date Published: 20 January 2004
PDF: 9 pages
Proc. SPIE 5198, Hard X-Ray and Gamma-Ray Detector Physics V, (20 January 2004); doi: 10.1117/12.510747
Show Author Affiliations
William M. Quam, Bechtel Nevada (United States)
Thomas DeVore, Bechtel Nevada (United States)
Harold R McHugh, Bechtel Nevada (United States)
Robert D Vogel, Bechtel Nevada (United States)
John Wesolowski, Bechtel Nevada (United States)


Published in SPIE Proceedings Vol. 5198:
Hard X-Ray and Gamma-Ray Detector Physics V
Larry A. Franks; Arnold Burger; Ralph B. James; Paul L. Hink, Editor(s)

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