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首页> 外文期刊>Optical Materials >Comparison of absorption, luminescence and scintillation characteristics in Lu_(1.95)Y_(0.05)SiO_5:Ce,Ca and Y_2SiO_5:Ce scintillators
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Comparison of absorption, luminescence and scintillation characteristics in Lu_(1.95)Y_(0.05)SiO_5:Ce,Ca and Y_2SiO_5:Ce scintillators

机译:Lu_(1.95)Y_(0.05)SiO_5:Ce,Ca和Y_2SiO_5:Ce闪烁体的吸收,发光和闪烁特性比较

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摘要

The absorption, luminescence and scintillation characteristics of Y_2SiO_5:Ce(YSO:Ce) scintillator were investigated and compared to those of Lu_(1.95)Y_(0.05)SiO_5:Ce,Ca (LYSO:Ce,Ca) scintillator. Due to the Ca~(2+) co-doping in LYSO:Ce quantified by GDMS analysis, the Ce~(4+) center is evidenced in the absorption spectra. For 662 keV γ-rays (~(137)Cs source), YSO:Ce shows a light yield of 15,300 ph/MeV, which is much lower than that of 32,000 ph/MeV obtained for LYSO:Ce,Ca. The coincidence timing resolution for 511 keV annihilation quanta of 234 and 478 ps was obtained, respectively, for LYSO:Ce,Ca and YSO:Ce detectors in coincidence experiment using a BaF_2-based detector. Time resolution was also discussed in terms of a number of photoelectrons and decay time of the scintillation pulse.
机译:研究了Y_2SiO_5:Ce(YSO:Ce)闪烁体的吸收,发光和闪烁特性,并将其与Lu_(1.95)Y_(0.05)SiO_5:Ce,Ca(LYSO:Ce,Ca)闪烁体的吸收,发光和闪烁特性进行了比较。由于通过GDMS分析定量分析了LYSO:Ce中的Ca〜(2+)共掺杂,因此在吸收光谱中可以看到Ce〜(4+)中心。对于662 keV的γ射线(〜(137)Cs源),YSO:Ce的光产率为15,300 ph / MeV,远低于LYSO:Ce,Ca的32,000 ph / MeV。在使用基于BaF_2的探测器的重合实验中,LYSO:Ce,Ca和YSO:Ce探测器的511keV hil没量子的重合定时分辨率分别为234和478 ps。还根据光电子的数量和闪烁脉冲的衰减时间讨论了时间分辨率。

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