A SOLID-STATE COMPTON CAMERA FOR 3-DIMENSIONAL IMAGING

A Compton camera was constructed using four individual high-purity ger manium (HPGe) coaxial detectors in the front plane and four elements o f a 15 element HPGe coaxial array in the back plane. Co-60, Ba-133, an d Cs-137 sources were used in configurations that included single sour ces in positions covering the intended field-of-view and multiple sour ces of both identical isotopes and different isotopes. Experiments wer e also conducted with sources in waste-container sized attenuating med ia. This proof-of-concept experiment was designed to demonstrate non-t omographic three-dimensional imaging for the characterization of mixed waste containers. The present analysis demonstrates three-dimensional imaging of multiple sources at multiple energies and the imaging of s ources within a waste-container sized attenuating medium.