DETERMINATION AND CALCULATION OF ~(110m)Ag COINCIDENCE-SUM CORRECTION FACTOR OF HPGe γ SPECTROMETER
Song Haiqing Li Lingjuan Mo Guanghua Li Qiaoqin Huang Naiming(Guangdong Research and Monitoring Center of Environmental Radiation, Guangzhou, 510300)
110m Ag coincidence sum correction factors (c) of three HPGe γ spectrometers with different efficiency in our laboratory were experimentally determined. The function relationship between c of 10m Ag ( 657.76 keV) and counting efficiency of 137 Cs (661.66 keV) was established by fitting with the experimental data on one of the three HPGe γ spectrometers. The c of the other two HPGe γ spectrometers were calculated by the function and the maximum relative deviation is 6.4%. The function was also verified with the data of other laboratory and the relative deviation is less than 6.2%.