中文摘要：

强脉冲辐射场γ/快中子图像测量系统通常使用闪烁体作为源区信号的转换体。闪烁体的光输出和光学成像系统对闪烁光的收光效率是确定系统灵敏度及测量动态范围的关键参数。本文通过研究闪烁体与光敏器件在分离耦合条件下输出信号电流的变化规律,测量了YAG∶Ce3＋、ST401、EJ200、EJ260和EJ264等5种无机/塑料闪烁体的相对光输出,研究了耦合距离对光学成像系统收光效率的影响。结果表明,实验测量闪烁体的相对光输出在不同耦合距离条件下具有很好的一致性,分离耦合时计算光学成像系统的收光效率需考虑闪烁体光输出各向异性的影响。

英文摘要：

In the intense pulsed radiation fields,the scintillator is generally used as the converter of theγ-ray or fast neutron signals from the source region in an imaging system.The light output characteristic of the scintillator as well as the light collection efficiency of the optic imaging system to the scintillator is the key parameter for determining the system’s sensitivity and dynamic range.The relative light output of five types of inorganic/plastic scintillators such as YAG∶Ce3＋,ST401,EJ200,EJ260and EJ264,was obtained through studying the rule about the output current variation of the scintillator and photon-sensitive instrument in various coupling conditions. The influence of coupling distance on the light collection efficiency of the optic imaging system was also studied.The results indicate that the measured value of the scintillator light output achieves good consistency in conditions of different coupling distances,and the anisotropy of scintillating photon emission must be considered to determine the lightcollection efficiency of the optic imaging system.