Investigation of the Collimator Effect on the 3″x3″ NaI(Tl) Detector System by the FLUKA code

Abstract

The efficiency of the 3″x3″ NaI(Tl) detector and gamma attenuation calculations were investigated under the different collimation parameters. In this purpose, photon beams with 511 and 1332 keV energy were collimated by using Pb collimator with different diameters. This system was defined by the FLUKA Monte Carlo code; the detector efficiency and gamma attenuation coefficients were simulated.