| NUKLEONIKA 2008, 53(2):51-56
LIGHT YIELD NON-PROPORTIONALITY AND INTRINSIC ENERGY RESOLUTION OF DOPED CsI SCINTILLATORSWeerapong Chewpraditkul1, Lukasz Swiderski2, Marek Moszynski2 1 King Mongkut’s University of Technology Thonburi, Bangkok 10140, Thailand 2 Soltan Institute for Nuclear Studies, 05-400 Otwock-Świerk, Poland The light yield non-proportionality and energy resolution of doped CsI scintillators have been studied for gamma ray energies ranging from 16.6–1274.5 keV. The light yield non-proportionality of about 20% and the energy resolution of 7.6 ± 0.4% for 662 keV gamma rays have been achieved for 25 mm × 25 mm (in diameter) CsI(Na) crystal, coupled to an XP 5200 photomultiplier tube. The intrinsic resolution of the crystals vs. energy of gamma rays has been determined after correcting the measured resolution for photomultiplier tube statistics. The different shapes of intrinsic resolution curves observed with various samples of doped CsI are discussed. Close X |