本工作采用一台便携式HPGeγ谱仪系统,对核工业航测遥感中心二级放射性计量站的地面圆柱体放射性模型（φ220cm×60cm,以下简称圆柱体模型）的放射性核素比活度进行了就地测量分析。 谱仪系统采用美国ORTEC公司生产的GHX-20190-P-LP型 HPGeγ探测器,其晶体几何尺寸为φ54.8mm×57.9mm,相对探测效率ε=30.3％,对60Co　1.332 5 MeV的能量分辨率FWHM In this work, a portable HPGe gamma spectrometer system was used to measure the radionuclide specific activity of the ground cylindrical radioactive model (φ220cm × 60cm, hereinafter referred to as cylinder model) of the secondary radioactive metering station of the Nuclear Industry Survey and Remote Sensing Center Measurement and analysis. The spectrometer system adopts GHX-20190-P-LP type HPGeγ detector manufactured by ORTEC Corporation of the United States, the crystal geometry is φ54.8mm × 57.9mm, the relative detection efficiency ε = 30.3%, the energy resolution of 60Co 1.332 5 MeV FWHM