高效率低本底 HPGe γ谱仪和点源刻度

High Efficiency and Low Background HPGeγ-spectrometer and Calibration of Point Source Efficiency

文章介绍了高效率低本底 HPGe γ谱仪系统的结构和主要性能。用^(152)Eu,^(241)Am 和^(60)Co 标准点源做了效率刻度。该谱仪对^(60)Co γ射线的相对效率为44.6%。在50—1800keV 能量范围内,测量的不确定度为2—5%。

In this paper,the structure and main performances of high efficiencyand low background the HPGe γ-spectrometer system are described.Thecalibration of point source efficiency is done by ^(152)Eu,^(241)Am and ^(60)Costandarde point sources.The relative efficiency of the γ-spectrometer is44.56%.Measuring uncertainty is 2—5% within the limits of 50—1800keV γ-ray energy.