CAJ | 학술논문

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。
강맥충복사장γ/쾌중자도상측량계통통상사용섬삭체작위원구신호적전환체。섬삭체적광수출화광학성상계통대섬삭광적수광효솔시학정계통령민도급측량동태범위적관건삼수。본문통과연구섬삭체여광민기건재분리우합조건하수출신호전류적변화규률，측량료 YAG ∶ Ce3＋、ST401、EJ200、EJ260화EJ264등5충무궤/소료섬삭체적상대광수출，연구료우합거리대광학성상계통수광효솔적영향。결과표명，실험측량섬삭체적상대광수출재불동우합거리조건하구유흔호적일치성，분리우합시계산광학성상계통적수광효솔수고필섬삭체광수출각향이성적영향。
In the intense pulsed radiation fields ,the scintillator is generally used as the converter of the γ-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 ,EJ260 and EJ264 ,was obtained through studying the rule about the output current variation of the scintillator and photon-sensitive instrument in various coupling conditions . T he 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 light collection efficiency of the optic imaging system .