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| Research of Peak Efficiency Influencing Factor Corresponding with Density During Analysis of Dry Biological Sample by Using γ-spectrometry |
| ZHANG Jing, XU Cui-hua, LI Wen-hong, ZHAO Li, TUO Fei |
| National Institute for Radiological Protection, China CDC, Beijing 100088 China |
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Abstract Objective To study the influencing factor of peak efficiency during analysis of dry powder biological samples by using gamma spectrometry. Methods Measurement of radionuclides were carried out with GC3018 low background high purity germanium (HPGe) γ spectrometer. LabSOCS software was used for simulation after validated by calibration source. Results Peak efficiency of low-background HPGe γ spectrometer decreased exponentially with the increased density of sample box and sample material. Conclusions Based on fitting functions, a correction factor of efficiency for different mass of samples can be obtained quickly. It can meet the need for rapid determination of γ-emitting radionuclides in biological samples during nuclear emergency.
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Received: 02 September 2011
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