A cadmium-zinc-telluride crystal array spectrometer

Conference · Mon Sep 01 04:00:00 EDT 2003

OSTI ID:816102

McHugh, H R ^[1]; Quam, W; DeVore, T; Vogle, R; Weslowski, J

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1. Bechtel Nevada

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 imp roved 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.

• Research Organization: Bechtel Nevada Corporation (US)
• Sponsoring Organization: US Department of Energy (US)
• DOE Contract Number: AC08-96NV11718
• OSTI ID: 816102
• Report Number(s): DOE/NV/11718--784
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
CDTE SEMICONDUCTOR DETECTORS
CZT
DESIGN
ENERGY RESOLUTION
GAMMA SPECTROMETER
GAMMA SPECTROMETERS
ISOTOPE IDENTIFIER
PERFORMANCE