掺铈YAP晶体的时间响应性能测量  

Time capability measurement of photo-excited fluorescence of YAP:Ce scintillator

作　　者：李忠宝[1] 胡孟春[1] 周刚[1] 冯春[1] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,绵阳621900

出　　处：《电子测量与仪器学报》2009年第11期79-82,共4页Journal of Electronic Measurement and Instrumentation

摘　　要：对YAP:Ce晶体的时间响应性能进行了测量。利用锁模激光器产生的266nm激光照射到YAP:Ce晶体上,用GD40透紫光电管接受晶体产生的荧光,测量了YAP:Ce晶体的时间特性,得到了完整波形和时间性能参数。测量结果表明,波形前沿、半高宽、后沿和衰减时间分别为0.86ns、12.53ns、41.30ns和18.77ns。通过实验发现该晶体衰减时间很短(～26ns),比NaI:Tl快一个量级。且该晶体具有高光输出、高能量分辨率、高时间分辨率、对γ辐射敏感、γ/n甄别能力强等特点,该国产晶体在γ脉冲辐射测量中是一种比较好的候选晶体。Ce scintillator is an inorganic fast-response crystal. The time-capability of YAP： Ce scintillator is measured by the measurement system, that consists of LASER（emits laser of 266nm wavelength）, YAP： Ce scintillator, photoelectric cell etc, and the waveform and time-capability parameter are obtained. The experiment result indicates that rise-time, fall-time, FWHM and decay time is 0.86ns, 41.30ns, 12.536ns and 18.77ns, respectively. The result show that YAP： Ce scintillator is fastresponse crystal scintillation decay time is faster one order of magnitude than that of NaI： T1. Furthermore it has light output and high sensitive to y pulse. It may be used in low intensity γ pulse radiation field.

关 键 词：上升时间 下降时间 半高宽 衰减时 YAP:Ce闪烁体 光致激发 

分 类 号：TL812[核科学技术—核技术及应用] TL816