Luminescence and Scintillation Properties of Ce-Doped LYSO and YSO Crystals

Abstract:

The luminescence and gamma-ray detection properties of the new cerium-doped rare-earth scintillator lutetium-yttrium oxyorthosilicate ( Lu_1.95Y_0.05SiO₅:Ce, LYSO:Ce) were investigated and compared to those of cerium-doped yttrium oxyorthosilicate ( Y2SiO5: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. In spite of significant progress in light yield and luminescence properties, the energy resolution of LYSO:Ce appears to still suffer from an excess variance in the number of scintillation photons. The mass attenuation coefficient of LYSO:Ce and YSO:Ce for 662 keV gamma rays was also measured by transmission method and compared with the theoretical values calculated by WinXCom program.

• Periodical: Advanced Materials Research (Volumes 199-200)
• Pages: 1796-1803
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.199-200.1796
• Online since: February 2011
• Authors: Chalerm Wanarak, WEERAPONG CHEWPRADITKUL, Akapong Phunpueok, Jakrapong Kaewkhao
• Keywords: Energy Resolution, Luminescence, LYSO:Ce, Non-Proportionality of the Light Yield, Scintillation Crystals, YSO:Ce

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