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本文报道了用多坩埚下降法生长的大尺寸PbWO4: (Sb,Y)晶体的光谱和闪烁性能。基于透射光谱、X射线激发的发射谱、紫外激发及其发射谱、光产额和超短脉冲X射线激发荧光寿命等方面的测试,讨论了Sb,Y双掺杂对PbWO4 晶体的光谱和闪烁性能的作用。结果表明:Sb,Y双掺杂能显著改善PbWO4 晶体的光谱性能和闪烁性能,使PbWO4 晶体在短波方向的透过率明显提高;对于尺寸为 23×23×20mm3 的掺杂晶体样品,光产额最大值大约为 50p.e. /MeV,约为BGO光产额的 6. 0%;发光成份中有 1. 9ns和 15. 8ns两个衰减时间常数的快成份。
In this paper, the spectral and scintillation properties of large-size PbWO4: (Sb, Y) crystals grown by the multi-crucible drop method are reported. Based on the transmission spectra, emission spectra of X-ray excitation, UV excitation and emission spectra, the yield of light and the fluorescence lifetime of ultrashort pulse X-ray, the effects of Sb and Y doping on the spectra and scintillation The role of performance. The results show that Sb and Y doping can significantly improve the spectral properties and scintillation properties of PbWO4 crystal, and improve the transmittance of PbWO4 crystal in the shortwave direction. For the 23 × 23 × 20mm3 doping crystal samples, The maximum value is about 50p.e./MeV, which is about 6.0% of the BGO light yield. The fast component of the decay time constant of 1. 9ns and 15. 8ns in the light-emitting component.