Scintillation properties of Lu3Al5O12, Lu2SiO5 and LaBr3 crystals activated with cerium
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Publication Details
Author list: Chewpraditkul W., Moszynski M.
Publisher: Elsevier B.V.
Publication year: 2011
Volume number: 22
Start page: 218
End page: 226
Number of pages: 9
ISSN: 1875-3884
eISSN: 1875-3884
Languages: English-Great Britain (EN-GB)
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Abstract
The performances of Ce-activated Lu3Al5O12 (LuAG:Ce), Lu2SiO5 (LSO:Ce) and LaBr3 (LaBr3:Ce) scintillator crystals were investigated for γ-ray detection. The light yield and energy resolution were measured using photomultiplier tube (XP5500B PMT) readout. For 662 keV (137Cs source), an energy resolution of 3.5% obtained for LaBr3:Ce is much better than that of 6.7% and 8.3%, respectively, for LuAG:Ce and LSO:Ce. The light yield nonproportionality and energy resolution versus energy of γ-rays were measured and the intrinsic resolution of the crystals was determined. The LaBr3:Ce exhibits a good proportionality within 7% deviation from unity at 16.6 keV, which is much better than that of 22% and 45%, respectively, for LuAG:Ce and LSO:Ce. The photofraction was determined at 320, 662 and 835 keV for studied crystals and compared with the ratio of the cross-sections for the photoelectric effect to the total one calculated using WinXCom program. © 2011 Published by Elsevier B.V.
Keywords
Ce-activated scintillators, Energy resolution, LSO:Ce, LuAG:Ce, Photofraction, γ- ray detection
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