Simulations of a Scintillator Compton Gamma Imager for Safety and Security

Details Simulations of a Scintillator Compton Gamma Imager for Safety and Security Simulations of a Scintillator Compton Gamma Imager for Safety and Security

2008-09-24

arxiv.org/abs/0809.4240v2

IEEE Trans.Nucl.Sci.56:1262-1268,2009

Physics

Instrumentation and Detectors

Revised text and figures, Presented at SORMA West 2008, Published in IEEE Transactions on Nuclear Science

Scientific paper

10.1109/TNS.2009.2019271

We are designing an all-scintillator Compton gamma imager for use in security investigations and remediation actions involving radioactive threat material. To satisfy requirements for a rugged and portable instrument, we have chosen solid scintillator for the active volumes of both the scatter and absorber detectors. Using the BEAMnrc/EGSnrc Monte Carlo simulation package, we have constructed models using four different materials for the scatter detector: LaBr_3, NaI, CaF_2 and PVT. We have compared the detector performances using angular resolution, efficiency, and image resolution. We find that while PVT provides worse performance than that of the detectors based entirely on inorganic scintillators, all of the materials investigated for the scatter detector have the potential to provide performance adequate for our purposes.

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