Ce:YAG闪烁晶体的γ射线相对能量响应研究  

Gamma-ray relative energy response of Ce:YAG crystal

作　　者：张建华[1] 张传飞[1] 胡孟春[1] 彭太平[1] 王振通[1] 唐登攀[1] 赵广军[2] 

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 [2]中国科学院上海光学精密机械研究所,上海201800

出　　处：《核技术》2010年第6期469-472,共4页Nuclear Techniques

摘　　要：Ce:YAG闪烁晶体对在脉冲γ射线测量有重要应用,本文研究其γ射线相对能量响应。用Compton散射原理把强60Co源分解成若干单能点γ射线源,测定了国产Ce:YAG闪烁晶体的γ射线相对能量响应,将结果与质能吸收系数的数值计算结果相比较,两者在实验测量不确定范围内符合得很好。结果表明,用质能吸收系数进行无机闪烁晶体的γ射线相对能量响应的数值计算方法可靠,Compton散射原理提供较合适的单能γ射线辐射源以实验刻度无机闪烁晶体的γ射线的相对能量响应的方法也可行,可用于检验数值计算结果的可靠性。Gamma-ray relative energy response of Ce：YAG crystal, which is important for pulsed γ-ray measurement, was studied in this work. The Ce：YAG crystal, which was developed at Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, was aligned point by point with γ-rays scattered from an industrial 69Co line source. The γ-ray relative energy response was calculated using the mass attenuation coefficient. The results show that the numerical calculation method of γ-ray relative energy response is reliable, and the experimental method with multi-energy point γ-ray by Compton scattering is also feasible, that can be used for checking up correctness of the numerical calculation results.

关 键 词：脉冲γ射线测量 Ce:YAG闪烁晶体 γ射线相对能量响应 COMPTON散射 质能吸收系数 

分 类 号：TL812[核科学技术—核技术及应用] TL816