两种掺Yb3+闪烁晶体光致激发时间性能的实验研究

利用皮秒脉冲固体激光器测量了Yb∶YAP和Yb∶YAG闪烁晶体的时间响应性能，利用普通光电探测器和透紫光电探测器初步观察了光谱匹配对闪烁探测器时间响应性能的影响。测量结果表明：普通光电探测器配Yb∶YAP闪烁晶体时间衰减常数为1.206ns，透紫光电探测器配Yb∶YAP闪烁晶体时间衰减常数为0.428ns，配Yb∶YAG闪烁晶体时间衰减常数为0.411ns，其时间性能优于BaF₂晶体；闪烁探测器时间响应对光谱匹配有依赖关系。

Experimental Research on Time Response of Two Kinds of Yb3+-Doped Scintillators Emission Spectra Excited by Laser

The time responses of Yb∶YAP and Yb∶YAG scintillators were measured with a picosecond solid laser as excited source.Both ordinary and UV-transmitting photoelectric cells were applied respectively for researching the effect of scintillator emission spectrum on detectors’ time response.The experiment results show that the time attenuation constant of Yb∶YAP scintillator emission is 1.206 ns as measured by ordinary photoelectric cell and 0.428 ns as measured by UV-transmitting photoelectric device,and the time attenuation constant of Yb∶YAG scintillator emission is 0.411 ns as measured by UV-transmitting photoelectric device.The time response is better than that of BaF2 scintillator.There is definite relationship between the time response of scintillator detector and the scintillator emission spectrum.