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

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, Brian² 

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

关键词: CdZnTe;    Position-Sensitive;    VFG Gamma-Ray Detectors;    Safeguards Applications;   

DOI  :  10.2172/1328361
RP-ID  :  BNL--112190-2015
PID  :  OSTI ID: 1328361

学科分类：核物理和高能物理

美国|英语

来源: SciTech Connect

【 摘 要 】

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.