摘要
在核事故应急监测航空测量中，角响应函数Ｆ（，θ）是航测谱仪的基本刻度量。本文主要报道ＮａＩ（Ｔｌ）航测谱仪对１３７Ｃｓ和６０Ｃｏ点源角响应函数的地面刻度方法及其结果，其不确定度一般小于２０％。利用该结果，采用数值积分方法，对地表均匀分布的１３７Ｃｓ沉积面源，计算了安装在运五飞机上的ＮａＩ（Ｔｌ）航测谱仪（３箱晶体）不同飞行高度的刻度因子，不确定度小于３０％。在石家庄航测动态测试带的天然本底辐射场下，９０ｍ和１２０ｍ飞行高度下的最小探测限分别为３．８和５．６ｋＢｑ／ｍ２。
The angle response function F(φ,θ) is a basic calibration of airborne spectrometers in airborne surveying for nuclear emergency monitoring. This paper describes the method and results of angle response function calibration of a NaI(Tl) airborne spectrometer for 137 Cs and 60 Co point sources on the ground, with less than 20% uncertainty. By using the results, the calibra tion factors of the NaI(Tl) airborne spectrometer fixed in Yun 5 plane at different flying heights are calculated by numerical integral method for 137 Cs uniform area source on ground surface, with less than 25% uncertainty. The minimum detection limits (L D) are calculated at 90 m and 120 m flying heights in the range of over Shijiazhuang airborne surveying for 137 Cs uniform area source on ground surface to be 3.82 and 5.62 kBq/m 2, respectively. (
出处
《辐射防护》
CAS
CSCD
北大核心
1998年第3期175-184,共10页
Radiation Protection
关键词
航空测量
角响应
地面刻度
核事故应急
谱仪
铯
Airborne Surveying, Angle Response Function, Calibration on the Ground, Calibration Factor, Nuclear Emergency)
