Light Yield Non-proportionality and Energy Resolution of LaCl3(10%Ce) and CsI(Na) Crystals

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Weerapong Chewpraditkul
King Mongkut's University of Technology Thonburi, Bangmood, Toongkru, Bangkok 10140, Thailand
Pinpan Visal-athaphand
King Mongkut's University of Technology Thonburi, Bangmood, Toongkru, Bangkok 10140, Thailand
Somchai Panya-inkaew
King Mongkut's University of Technology Thonburi, Bangmood, Toongkru, Bangkok 10140, Thailand
Inthira Sripichai
King Mongkut's University of Technology Thonburi, Bangmood, Toongkru, Bangkok 10140, Thailand
Lukasz Swiderski
Researcher, Department of Nuclear Radiation Detector and Electronics.
Marek Moszynski
Soltan Institute for Nuclear Studies, PL05-400 Swierk-Otwock, Poland

Abstract

The scintillation response of ∅13 mm × 13 mm LaCl3(10%Ce) and ∅10 mm × 10 mm CsI(Na)crystals were studied for γ-ray energies ranging from 22.1 keV to 1,274.5 keV. The light yield non-proportionalityand energy resolution were measured with a Photonis XP5200 PMT. The energy resolution,obtained in this work, for 661.6 keV peak from 137Cs, are 4.6 ± 0.2 % and 6.5 ± 0.3 %, respectively, forLaCl3(10%Ce) and CsI(Na). LaCl3(10%Ce) showed approximately a linear relationship between energyresolution and the inverse square root of the energy, while the step-like curve with a semi - plateau in theenergy range between 100 keV and 300 keV was observed for CsI(Na). The LaCl3(10%Ce) showed a lightyield non – proportionality of about 4% upon lowering energy from 1,274.5 keV to 22.1 keV, which isbetter than that of about 17% obtained for CsI(Na). The total and intrinsic energy resolutions are discussed.

Keywords : Scintillator / LaCl3(10%Ce) / CsI(Na) / Non-proportionality of Light Yield /Energy Resolution / Intrinsic Resolution

 

 

Article Details

Issue
Vol. 31 No. 4 (2008): October - December
Section
Original Articles
Author Biographies

Weerapong Chewpraditkul, King Mongkut's University of Technology Thonburi, Bangmood, Toongkru, Bangkok 10140, Thailand

Associate Professor, Department of Physics, Faculty of Science.

Pinpan Visal-athaphand, King Mongkut's University of Technology Thonburi, Bangmood, Toongkru, Bangkok 10140, Thailand

Associate Professor, Department of Physics, Faculty of Science.

Somchai Panya-inkaew, King Mongkut's University of Technology Thonburi, Bangmood, Toongkru, Bangkok 10140, Thailand

Lecturer, Department of Physics, Faculty of Science.

Inthira Sripichai, King Mongkut's University of Technology Thonburi, Bangmood, Toongkru, Bangkok 10140, Thailand

Assistant Professor, Department of Physics, Faculty of Science.

Lukasz Swiderski, Researcher, Department of Nuclear Radiation Detector and Electronics.

Soltan Institute for Nuclear Studies, PL05-400 Swierk-Otwock, Poland

Marek Moszynski, Soltan Institute for Nuclear Studies, PL05-400 Swierk-Otwock, Poland

Professor, Department of Nuclear Radiation Detector and Electronics.