碘化钠探测器和高纯锗探测器γ能谱仪性能比较

Comparison of Performances of NaI and HPGe Detectors

用碘化钠(NaI)闪烁体探测器和高纯锗(HPGe)半导体探测器γ能谱仪测量了137Cs、152Eu标准放射源和铅室本底的γ射线能谱.分析研究NaI探测器与HPGe探测器的能量分辨率、探测效率等特性,通过能谱分析还给出了铅室本底中可能含有的放射性核素,并对HPGe探测器进行了部分能量范围内的效率刻度.

The γ ray spectra of ()^(137)Cs and ()^(152)Eu standard radiation sources and the background of lead shield chamber have been measured using NaI and HPGe detectors and a γ ray spectrometer. The resolution and the detection efficiency of the two detectors have been studied. The radioactive (nuclides,) which may be contained in the lead shield chamber, are provided in the γ ray spectrum (analysis). The efficiency scales of the HPGe detector are made in a range of energy.