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通过区熔法获得了铈掺杂焦硅酸钇闪烁单晶(Y_2Si_2O_7:Ce~(3+),简写为YPS),并对其闪烁与热释光性能进行了研究.对YPS:Ce闪烁晶体的透过、光输出和光衰减等光学和闪烁性能进行了表征,并对其综合性能进行了评价.其衰减时间为30.16ns,为目前铈掺杂焦硅酸盐闪烁晶体中最快的.并采用热释光测试技术,对YPS:Ce晶体中的缺陷进行了研究,发现在300～500K温度区间内一共有三个热释光峰,分别对应于三个缺陷,通过对二维(温度-光强)的拟合,确定了这三种缺陷的陷阱深度、振动频率等物理参数.并结合三维(温度-波长-光强)热释光谱,提出了YPS:Ce的热释光模型.
Cerium doped yttrium disilicate scintillation single crystal (Y_2Si_2O_7: Ce ~ (3+), abbreviated as YPS) was obtained by zone melting method, and its scintillation and thermoluminescence properties were studied.For YPS: Ce scintillation crystal The optical and flicker properties such as optical output and optical attenuation were characterized and their comprehensive performance was evaluated.The decay time was 30.16ns, which is the fastest among the cerium-doped disilicate scintillation crystals. The thermoluminescence test technique was used to study the defects in the YPS: Ce crystal. Three thermoluminescence peaks were observed in the temperature range from 300K to 500K, which correspond to three defects respectively. The two-dimensional (temperature- Light intensity), the physical parameters such as trap depth and vibration frequency were determined, and the thermoluminescence model of YPS: Ce was proposed based on three-dimensional (temperature-wavelength-intensity) pyrolysis spectrum.