Color gamma ray camera: Laboratory directed research & development (LDRD) FY 1995

Gamma-Ray imaging is a potentially powerful tool for the areas of arms-control, counter proliferation, safeguards and forensics. Combining spectral and spatial information increases the amount of information available for the detection and characterization of Special Nuclear Material (SNM). Two advanced gamma ray imaging technologies have been completed and are nearing completion at LLNL. These include the Gamma Ray Imaging System (GRIS), used to detect sub-600 keV gamma rays, and the Gamma Ray Bar Imaging Telescope (GRABIT), which extends the work of GRIS to larger areas and higher energies ({approximately}1000 keV). We proposed to continue work on a third, complementary type of detector, a Gamma Ray Color Camera (GRCC), which will incorporate spatial and spectral information from a gamma emitter