快响应无机闪烁体CeF_3的时间特性研究

Study on Time Characteristics of Fast Time Response Inorganic Scintillator CeF_3

CeF3是一种新型的适合脉冲γ测量的快响应无机闪烁体。本工作采用上升时间约为0 8ns、半高宽为1 5～2 2ns的脉冲辐射源,对CeF3与光电管构成探测器的时间响应进行了测量。多组实验测量结果表明:CeF3的脉冲响应前沿时间小于2ns,半高宽约10ns,波形响应后沿约60ns,平均发光衰减常数为20～30ns。

The cerium fluoride(CeF3) is a kind of new fast time response inorganic scintillator. The physical characteristics of CeF3 are well suitable for detection of domestic pulse γrays. The time response of detector composed by phototube with CeF3 are measured by use of the pulse radiation source with rise time about 08 ns, and FWHM time 1.5～22 ns. Experiment results show that the rise time is less than 2 ns, FWHM time is about 10 ns, fall time is about 60 ns, average decay time constant is 20～30 ns,respectively for CeF3.