The performance of two broad energy Germanium types HPGe γ spectrometers was tested in this work.The impact of different standard sources,detector distances,and dead times on the detection efficiency of the two broad energy Germanium types HPGe γ spectrometers was explored.The test results showed that the R2 values of the energy calibration curves for the two broad energy Germanium types HPGe γ spectrometers were both 1,indicating good linearity.When the energy was less than 165 keV,the detection efficiency of the two detectors was significantly better than that of traditional P-type detector,and the differences in sample diameter and thickness had a significant impact on the detectors efficiency.When the calibration source was 5 cm and 10 cm away from the detector and the energy was less than 391 keV,the detection efficiency of the BE6530 was higher than that of the GEM－C65.Conversely,when the energy was greater than 391 keV,the result was reversed.In addition,this study expanded the measurement range for samples with high activity using the HPGe γ spectrometers.By using a correction formula to correct the counting rate results with a dead time of 50%,it showed that the relative deviation of the corrected environmental samples in the two spectrometers was significantly reduced.
维普
万方数据