Comparison of Lu1.8Y0.2SiO5:Ce and LaCl3:Ce Scintillators in Gamma-Ray Spectrometry

Article Sidebar

Cove_V33_N4
PDF
Keywords:
Energy Resolution Intrinsic Resolution LaCl3 Ce LYSO Non-proportionality of the Light Yield Photofraction Scintillator

Main Article Content

Chalerm Wanarak
King Mongkut's University of Technology Thonburi, Bang Mod, Thung Khru, Bangkok 10140
Weerapong Chewpraditkul
King Mongkut's University of Technology Thonburi, Bang Mod, Thung Khru, Bangkok 10140

Abstract

The scintillation response of Lu1.8Y0.2SiO5:Ce (LYSO:Ce) and LaCl3:Ce scintillators were compared under Gamma ray excitation using photomultiplier tube (PMT) readout. For 662 keV Gamma rays (137 Cs source), energy resolution of 4.5±0.2% obtained for LaCl3:Ce coupled to XP5200B PMT is much better than that of 8.2±0.4% for LYSO:Ce. The estimated photofraction of 26.1% at 662 keV for LYSO:Ce is higher than that of 15.7% for LaCl3:Ce. The non-proportionality of the light yield and energy resolution versus Gamma ray energy were measured and the intrinsic resolution of the crystals was calculated. Special attention was devoted to the correlation between intrinsic resolution and non-proportional response of scintillators.

Keywords : Energy Resolution / Intrinsic Resolution / LaCl3:Ce, LYSO:Ce / Non-proportionality of the Light Yield / Photofraction / Scintillator

 

 

Article Details

Issue
Vol. 33 No. 4 (2010): October - December
Section
Original Articles
Author Biographies

Chalerm Wanarak, King Mongkut's University of Technology Thonburi, Bang Mod, Thung Khru, Bangkok 10140

Ph.D. Student, Department of Physics, Faculty of Science.

Weerapong Chewpraditkul, King Mongkut's University of Technology Thonburi, Bang Mod, Thung Khru, Bangkok 10140

Associate Professor, Department of Physics, Faculty of Science.