High-Efficiency CdZnTe Position-Sensitive VFG Gamma-Ray Detectors for Safeguards Applications

Technical Report · Wed Sep 30 00:00:00 EDT 2015

DOI:https://doi.org/10.2172/1328361· OSTI ID:1328361

Bolotnikov, Aleksey E. ^[1]; James, Ralph B. ^[1]; Cui, Y. ^[1]; De Geronimo, G. ^[1]; Vernon, E. ^[1]; Camarda, G. S. ^[1]; Hossain, A. ^[1]; Yang, G. ^[1]; Indusi, J. ^[1]; Boyer, Brian ^[2]

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1. Brookhaven National Lab. (BNL), Upton, NY (United States)
2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

The goal of this project is to incorporate a Cadmium-Zinc-Telluride (CdZnTe or CZT) detector (with 1% or better resolution) into a bench-top prototype for isotope identification and related safeguards applications. The bench-top system is based on a 2x2 array of 6x6x20 mm³ position-sensitive virtual Frisch-grid (VFG) CZT detectors. The key features of the array are that it allows for the use of average-grade CZT material with a moderate content of defects, and yet it provides high energy resolution, 1% FWHM at 662 keV, large effective area, and low-power consumption. The development of this type of 3D detector and new instruments incorporating them is motivated by the high cost and low availability of large, > 1 cm³, CZT crystals suitable for making multi-pixel detectors with acceptable energy resolution and efficiency.

• Research Organization: Brookhaven National Lab. (BNL), Upton, NY (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation
• Contributing Organization: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
• DOE Contract Number: SC0012704
• OSTI ID: 1328361
• Report Number(s): BNL-112190-2015; TRN: US1700349
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL PROTECTION
ENERGY RESOLUTION
GAMMA DETECTION
CADMIUM TELLURIDES
SAFEGUARDS
KEV RANGE 100-1000
ZINC TELLURIDES
ISOTOPE RATIO
POSITION SENSITIVE DETECTORS
CdZnTe
Position-Sensitive
VFG Gamma-Ray Detectors
Safeguards Applications