Scintillation response of Lu 1.95Y 0.05SiO 5:Ce and Y 2SiO 5:Ce single crystal scintillators
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Publication Details
Author list: Wanarak C., Phunpueok A., Chewpraditkul W.
Publisher: Elsevier
Publication year: 2012
Volume number: 286
Start page: 72
End page: 75
Number of pages: 4
ISSN: 0168-583X
eISSN: 1872-9584
Languages: English-Great Britain (EN-GB)
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Abstract
The scintillation response of the new cerium-doped rare-earth scintillator lutetium-yttrium oxyorthosilicate (Lu 1.95Y 0.05SiO 5:Ce, LYSO:Ce) were investigated and compared to those of cerium-doped yttrium oxyorthosilicate (Y 2SiO 5:Ce, YSO:Ce) crystal. The light yield and energy resolution were measured using photomultiplier tube (PMT) readout. The non-proportionality of the light yield and energy resolution versus γ-ray energy were measured and the intrinsic resolution of the crystals was calculated. For 662 keV γ-rays ( 137Cs source), LYSO:Ce showed a light yield of 37,400 ± 3700 ph/MeV, which is much higher than that of 26,300 ± 2600 ph/MeV obtained for YSO:Ce. The energy resolution of 6.8 ± 0.2% obtained with YSO:Ce is better than that of 7.7 ± 0.2% obtained with LYSO:Ce, due to its better intrinsic resolution and proportionality in light yield. The photofraction was determined for both crystals and compared with the cross-sections ratio calculated using WinXCom program. The experimental results of the total mass attenuation coefficients for both crystals are in good agreement with the theoretical values, within the experimental uncertainty. © 2011 Elsevier B.V. All rights reserved.
Keywords
Energy resolution, LYSO:Ce, Non-proportionality of the light yield, Scintillation crystal, YSO:Ce
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