Scintillation properties of LuAG:Ce, YAG:Ce and LYSO:Ce crystals for gamma-ray detection
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Author list: Chewpraditkul W., Swiderski L., Moszynski M., Szczesniak T., Syntfeld-Kazuch A., Wanarak C., Limsuwan P.
Publisher: Institute of Electrical and Electronics Engineers
Publication year: 2009
Volume number: 56
Issue number: 6
Start page: 3800
End page: 3805
Number of pages: 6
ISSN: 0018-9499
eISSN: 1558-1578
Languages: English-Great Britain (EN-GB)
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Abstract
The scintillation properties of LuAG:Ce and YAG:Ce crystals were compared with LYSO:Ce crystal under γ -ray excitation. Light yield non-proportionality and energy resolution were measured with a Photonis XP5500B PMT. The energy resolution, obtained in this work for 662 keV γ-rays, was 6.7, 7.0 and 8.7%, respectively, for LuAG:Ce, YAG:Ce and LYSO:Ce detectors. The values reflect the influence of the light yield non-proportionality on the measured energy resolution. A fast component in the scintillation decay of LuAG:Ce crystal is faster than that of the YAG:Ce crystal, whereas the relative intensity of a fast component for YAG:Ce crystal is higher than that of LuAG:Ce crystal. The coincidence time resolution, obtained in this work for 511 keV annihilation quanta, was 660, 583 and 222 ps, respectively, for YAG:Ce, LuAG:Ce and LYSO:Ce detectors in coincidence experiment together with a BaF detector. Time resolution was also discussed in terms of a number of photoelectrons and decay time of the light pulse. © 2009 IEEE.
Keywords
Coincidence time resolution, YAG:CE
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