【作者】 彭博栋； 盛亮； 任国浩； 张美； 魏福利； 王培伟； 赵吉祯；

【Author】 PENG Bo-dong~1,SHENG Liang~1,REN Guo-hao~2,ZHANG Mei~1,WEI Fu-li~1 (1.Northwest Institute of Nuclear Technology,Xi’an of Shaanxi Prov.710024,China; 2.Shanghai Institute of Ceramics,Chinese Academy of Science,Shanghai 200050,China)

【机构】 西北核技术研究所； 中国科学院上海硅酸盐研究所；

【摘要】 掺铈铝酸钇镥（LuAlO₃:Ce或LuAP:Ce）晶体是少数能同时满足高密度、快衰减、光输出较高的无机闪烁体之一,有望应用于脉冲辐射测量领域,提供更佳的时间分辨率。对上海硅酸盐研究所提供的Lu_0.3Y_0.7AP:Ce晶体样品的发光特性进行了测量。分别在253 nm高功率汞灯和⁶⁰Co源激发下,测量了晶体样品的激发发光光谱,得到晶体发光光谱中心波长在380 nm左右。在紫外激光脉冲激发下,测得Lu_0.3Y_0.7AP:Ce晶体的衰减时间为17.5 ns;在纳秒级脉冲伽马辐射源激发下,其衰减分量由两部分组成,其中:24 ns—44%,83 ns—56%。利用与LSO相对比较法,在⁶⁰Co源连续激发下测量了晶体的光输出,考虑到LSO与Lu_0.3Y_0.7AlO₃:Ce发光中心的不同,对测量系统进行光谱响应补偿后,得到Lu_0.3Y_0.7AlO₃:Ce晶体光输出为LSO晶体的40%左右,相当于10000 photons/MeV。Lu_0.3Y_0.7AP:Ce晶体要实际应用在脉冲辐射测量领域,还有待于对其发光机理、晶体生长技术的深入研究,以提高晶体质量,改善晶体性能。更多还原

【Abstract】 LuAP:Ce is a promising scintillator which has high density,short decay time and a reasonable light yield.It can improve the time resolving ability of the detecting system in high energy physics.The luminescence characterize measurements result of the Lu_0.3Y_0.7AP:Ce crystal specimen which is provided by Shanghai Institute of Ceramics is reported.The luminescence spectrum is recorded when the crystal is excited by Hg lamp and ⁶⁰Coγsource respectively, which shows that the luminescence center is 380nm。The decay time shows different value under different sources,which is 17.5 ns when excited by UV laser pulse while 24 ns-44%,83 ns-56%byγpulse.The light yield of Lu_0.3Y_0.7AP:Ce is about 10 000 photons/MeV considering the spectrum response of the measurement system,that is 40%of LSO. The research on mechanism of luminescence and growth technology of the crystal is needed to provide high quality crystals which can meet the requirements in high energy physics.更多还原