航空伽玛能谱测量系统标定技术与标定程序

摘要

航空伽玛能谱测量是直接寻找铀矿和进行区域地质调查的重要技术手段，在地质勘探、环境辐射评价、核应急和军控核查等方面具有重要作用。航空伽玛能谱仪探测K、U、Th核素衰变系列的伽玛射线窗口计数，要将测量计数率换算成地面放射性核素含量就需要对航空伽玛能谱测量系统进行标定，系统标定是航空伽玛能谱测量中最为复杂的程序，也是航空伽玛能谱测量的一项关键技术。论文系统介绍了目前中国国土资源航空物探遥感中心实施的航空伽玛能谱测量系统标定技术及相应的标定程序，这对理解航空伽玛能谱测量及资料应用具有实际意义。%Airborne gamma-ray spectrometric survey is a key exploration technique for detecting uranium.It plays an important role in terms of geological exploration, environmental radiation evaluation, nuclear emergen-cy and Comprehensive Nuclear Test Ban Treaty ( CTBT) verification.Airborne gamma-ray spectrometer de-tects radionuclides by counting gamma-ray counts in K-, U-and Th-window.To convert measured counts into the radionuclide content on the ground, we need to calibrate the airborne gamma-ray spectrometry system. The system calibration becomes the most complex program in airborne gamma-ray spectrometric survey.It is also a key technology in airborne measurement.This paper systematically describes the implementation of air-borne gamma -ray spectrometric calibration in China Aero Geophysical Survey and Remote Sensing Center ( AGRS) and its calibration procedures.