Abstract
Monte Carlo simulations were performed to optimize the layer thickness of a Compton camera which utilizes multiple Compton scatterings. The optimum layer thickness was found to be less than 0.5 mm for 150 keV, 2 mm for 511 keV gamma rays and approximately 5 mm for 1000 keV gamma rays. The efficiencies of two multiple Compton scatter cameras which consist of a 20 layer stack of either 1 mm or 4 mm thick Si strip detectors surrounded by a 2 cm thick CsI(Tl) side counter are presented for 150–1000 keV gamma rays. The expected angular resolution of the proposed design (1 mm thick, 20 layer Si) is presented for different assumed noise levels over the energy range 150–1000 keV.
