One of the important problems of environmental gamma-ray spectrometry is the correction of background radiation. Part of the background radiation passes through the sample into the container before entering the detector, and some of them are absorbed or scattered by the sample material, so it is necessary to make corrections to increase the measurement accuracy. The P-type coaxial high-purity germanium detector system with 30% relative efficiency was used for gamma-ray spectrometry. In this study, the gamma spectra of the three reference materials RGU-1, RGTh-1, and RGK-1 were analyzed, as well as background correction for the same container containing air, double-distilled water, and pure silica dioxide, aluminum oxide, carbonate calcium, and iron oxide was done. The statistical analysis was performed on the basis of the Z-score for the differences between the calculated and reported activities by the International Atomic Energy Agency, which obtained the Z-score in the range of 1 and − 1.

环境伽马射线光谱法的重要问题之一是背景辐射的校正。背景辐射的一部分在进入检测器之前先穿过样品进入容器，并且其中一些被样品材料吸收或散射，因此有必要进行校正以提高测量精度。在P相对效率为30％的X型同轴高纯锗探测器系统用于伽马射线光谱分析。在这项研究中，分析了三种参考物质RGU-1，RGTh-1和RGK-1的伽玛光谱，并对装有空气，双蒸馏水和纯二氧化硅，铝的同一容器进行了背景校正完成了氧化，碳酸钙和氧化铁的制备。根据Z分数对国际原子能机构计算和报告的活动之间的差异进行了统计分析，国际原子能机构获得的Z分数在1到− 1的范围内。