大体积航空巡测γ谱仪的点源校准

参考国际原子能机构（IAEA）航空辐射监测技术标准和国内外行业经验，选取3种人工放射源对现有先进的大体积航空巡测γ谱仪进行了寻源模式的实验校准。介绍了航空巡测γ谱仪系统开展点源模式的实验校准方法、校准方案，实验过程中严格控制实验条件和过程质量，给出了²⁴¹Am、¹³⁷Cs和⁶⁰Co人工放射源点源校准参数，基于这3种核素校准参数可估算其他人工放射性核素的校准参数，从而实现了航测系统寻找人工放射源进行定量测量的功能。

Point Source Calibration of Mass Airborne γ-ray Spectrometer

Three kinds of man-made radioactive sources were chosen and experimental calibration for source-searching mode was done using existing advanced mass airborne γ-ray spectrometer based on technical standards of airborne radiation survey from IAEA and industrial experience of home and abroad. Experimental calibration method and plan in point source mode using airborne γ-ray spectrometer were introduced. In the process of the experiment, experiment condition and process quality were strictly controlled and calibration parameters of ²⁴¹Am, ¹³⁷Cs and ⁶⁰Co were obtained. Calibration parameters of other nuclides can be estimated according to those of ²⁴¹Am, ¹³⁷Cs and ⁶⁰Co and the airborne survey system is able to search man made radioactive sources and perform qualitative measurement by this way.