STUDIES ON COINCIDENCE SUMMING CORRECTION IN SCINTILLATION DETECTORS

Abstract

Studies on true coincidence summing in scintillation detectors is gaining increasing attention, due to its use in calculating the efficiencies of multi-gamma emitters and obtaining the efficiency calibration curve for these detectors. In the present work, we have carried our extensive measurements on coincidence summing in scintillation detectors using a source Co-60 that emits two gamma rays, namely 1173 and 1332 keV in cascade. The studies were made with Nal(Tl), LaBr3(Ce), LaC13(Ce) and Csl(Tl) detectors for different values of detector-source separation. Coincidence summing correction values were obtained using Vidmar's method. The experimental results were then compared with those obtained from realistic simulations and a good agreement has been found.