NaI(Tl)航测谱仪对^(137)Cs模拟面源的刻度  

Calibration of A NaI(Tl) Airborne Spectrometer for^(137)Cs Simulated Area Sources(In Chinese)

作　　者：刘新华 张永兴[2] 顾仁康[3] 沈恩升 

机构地区：[1]国家环保总局核安全中心,北京100088 [2]中国原子能科学研究院,北京102413 [3]核工业航测遥感中心,石家庄050002

出　　处：《中国核科技报告》2000年第1期170-180,共11页China Nuclear Science and Technology Report

摘　　要：根据数值积分原理,用有限个 Cs 点源模拟了两个有限大(半 137径为 15 m)和一个无限大 Cs 均匀面源,对一台安装在运五飞机 137内的 NaI(Tl)航测谱仪进行了地面刻度。对两个有限大 Cs 模拟均 137匀面源,NaI(Tl)航测谱仪的刻度因子平均值为 2.98×10- m2 ;2对无限大 Cs 均匀面源,其值为 3.77×10- m2,估计其不确定度 137 2小于 20%。用角响应函数方法,计算了实验条件下的刻度因子,结果与实验值在 10%范围内符合。By using numerical integration method, two limited (radius as 15 m) and a infinite137Cs uniform area sources are simulated with tens of 137Cs point sources. A NaI(Tl) airborne spectrometer set in Yun-5 airplane is calibrated for the simulated area sources. The mean of calibration factors of the spectrometer is 2.98×10- m2 for 2 two limited sources. The calibration factor of the spectrometer is 3.77×10- m2 for 2 the infinite source. The uncertainty of the calibration factors is estimated, and it is less than 20%. The calibration factors are also calculated by angle response function on the conditions. The results of measurement and calculation are of agreement within 10%.

关 键 词：模拟面 航测 谱仪 刻度因子 均匀面 点源 不确定度 面源 角响应函数 积分法 

分 类 号：TL[核科学技术]