作者：胡孟春, 冯璟华, 周刚, 李忠宝, 唐登攀, 张建华, 司粉妮, 黄雁
作者单位：中国工程物理研究院核物理与化学研究所, 四川 绵阳 621900
关键词：CeF3; ST401; 无机闪烁体; 辐射探测; 中子源; 灵敏度; 干扰
摘要：
n、混合场中测量辐射时,通常要应用无机闪烁体构成探测器,探测器抗中子干扰能力是判断测量信号质量的重要依据之一。无机闪烁体的绝对灵敏度是可以比较精确标定的,而无机闪烁体的中子绝对灵敏度是很难精确标定的,本文介绍稳态辐射源电流标定法,在不用测量测点注量率的情况下,也能够初步评估出无机闪烁体的抗中子干扰能力。
Neutrons-disturbance resisting capacity evaluation for inorganic scintillator by steady radiation source-current method
HU Meng-chun, FENG Jing-hua, ZHOU Gang, LI Zhong-bao, TANG Deng-pan, ZHANG Jian-hua, SI Fen-ni, HUANG Yan
Institute of Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China
Abstract: When measuring γ radiation in the neutron-gamma mixed field with inorganic scintillator as detector, the capacity of resisting neutrons-disturbance of the detector is an important basis for judging the quality of the signal. The γ absolute sensitivity of the inorganic scintillator can be calibrated accurately, but the neutron absolute sensitivity is very hard to be calibrated accurately. On the basis of this fact, this paper introduced the steady radiation source-current method and with which, the capacity of resisting neutrons-disturbance for inorganic scintillator can be evaluated without the measurement of neutron fluence rate.
Keywords: CeF3; ST401; inorganic scintillator; radiate detect; neutron source; sensitivity; disturbance
2012, 38(4): 10-12 收稿日期: 2012-1-18;收到修改稿日期: 2012-3-25
基金项目: 国防科学技术工业委员会民口配套研制项目(MKPT-05-084)中国工程物理研究院专项课题(902-305)
作者简介: 胡孟春(1963-),男,湖南株州市人,研究员,主要从事粒子探测技术研究。
参考文献
[1] 胡孟春,叶文英,周殿忠,等. CeF3闪烁探测器对DD中子的相对灵敏度[J]. 强激光与粒子束,2003,15(7):721-724.
[2] 胡孟春,叶文英,彭太平,等. 一种对中子相对不灵敏的大动态脉冲γ辐射探测器[J]. 高能物理与核物理,2003,27(4):354-358.
[3] 胡孟春,李忠宝,唐章奎,等. 脉冲DT中子场中的CeF3、ST401闪烁探测器输出比对[J]. 人工晶体学报,2005,34(2):380-383.
[4] 胡孟春. CeF3闪烁探测器对五种能量中子的甄别能力研究[J]. 人工晶体学报,2005,34(3):514-518.
[5] 胡孟春. 脉冲DT中子场中的CeF3、ST401闪烁探测器输出比对[J]. 人工晶体学报,2005,34(2):380-383.
[6] Moszynski M, Kapusta M, Wolski D. Properties of the YAP:Ce scintillator[J]. Nuclear Instruments and Methods in Physics Research,1998,404(1):157-165.
[7] Belogurov S,Bressi G, Carugno G. Properties of Yb-doped scintillators:YAG,YAP,LuAG[J]. Nuclear Instruments and Methods in Physics Research,2004,516(1):58-67.
[8] 胡孟春. 国产YAP:Ce闪烁晶体的相对探测能力测量[J]. 人工晶体学报,2008,37(6):1458-1461.
[9] 张建华,彭太平,胡孟春,等. YAP:Ce闪烁晶体的光致激发荧光衰减常数测量[J]. 人工晶体学报,2006,35(5):1057-1060.
[10] 张建华,张传飞,胡孟春,等. YAP:Ce闪烁探测器的γ射线灵敏度研究[J]. 核电子学与探测技术,2005,25(2):200-203.
[11] 李忠宝,胡孟春,周刚,等. Ce:YAP无机闪烁体光致激发时间性能测量[C]//全国核仪器应用核探测技术核测量方法学术会议论文集. 贵州:2007:186-188.
[12] Andriessen J, Antonyak O T, Dorenbos P, et al. Experimental and theoretical study of spectroscopic properties of Ce3+ doped LaCl3 single crystals[J]. Optics Communications,2000,178(4-6):355-363.
[13] Higgins W M, Glido J, Loef E V, et al. Bridgman growth of LaBr3:Ce and LaCl3:Ce crystals for high-resolution gamma-ray spectrometers[J]. Journal of Crystal Growth,2006,287(2):239-242.
[14] 胡孟春. 国产快响应无机闪烁体LaCl3:Ce探测能力测量[C]//四川省核学会核电子学与和探测器专委会. 广安:2007:83-86.
[15] 汲长松. 核辐射探测器及其实验技术手册[M]. 北京:原子能出版社,1990:293-295.
[16] 阿利比科夫A. 脉冲电离辐射探测器[M]. 北京:原子能出版社,1983:90-97.
[17] 刘庆兆. 脉冲辐射场诊断技术[M]. 北京:科学出版社,1994:109-125.
