Measurements with Pinhole and Coded Aperture Gamma-Ray Imaging Systems

Technical Report · Fri Jan 01 00:00:00 EST 2010

DOI:https://doi.org/10.2172/971586· OSTI ID:971586

Raffo-Caiado, Ana Claudia ^[1]; Solodov, Alexander A ^[1]; Abdul-Jabbar, Najeb M ^[1]; Hayward, Jason P ^[1]; Ziock, Klaus-Peter ^[1]

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1. ORNL

From a safeguards perspective, gamma-ray imaging has the potential to reduce manpower and cost for effectively locating and monitoring special nuclear material. The purpose of this project was to investigate the performance of pinhole and coded aperture gamma-ray imaging systems at Oak Ridge National Laboratory (ORNL). With the aid of the European Commission Joint Research Centre (JRC), radiometric data will be combined with scans from a three-dimensional design information verification (3D-DIV) system. Measurements were performed at the ORNL Safeguards Laboratory using sources that model holdup in radiological facilities. They showed that for situations with moderate amounts of solid or dense U sources, the coded aperture was able to predict source location and geometry within ~7% of actual values while the pinhole gave a broad representation of source distributions

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 971586
• Report Number(s): ORNL/TM-2009/076; NN4003020; MDGA517
• Country of Publication: United States
• Language: English