原子能科学技术2016，Vol.50Issue(12)：2240-2244,5.DOI:10.7538/yzk.2016.50.12.2240
提高 HPGe γ能谱法测量131Xem和133Xem探测灵敏度的方法研究
Method to Enhance Detection Sensitivities of 131 Xem and 133 Xem Measured by HPGe γSpectrometer
摘要
Abstract
Owing to their inert chemical properties ,large fission yields ,and abilities to easily vent into the atmosphere ,detection of radioactive xenon isotopes (131 Xem ,133 Xem , 133 Xe and 135 Xe) is one of the most effective technology of underground test monitoring . Due to the lower γ ray emission probability and energy overlapping of X ray , the detection sensitivities of 131 Xem and 133 Xem are lower measured by using HPGe γspectrometer .To enhance the detection sensitivities of 131 Xem and 133 Xem ,an X andγray interactive analysis method was developed .The distribution of the net peak counts in γspectrum was deduced through Bayesian approach .The likelihood function of 131Xem and 133 Xem activities was established by using the distribution of net peak counts of X and γray .The activities of 131Xem and 133Xem were estimated by maximum likelihood method . The detection sensitivities of 131Xem and 133Xem are enhanced comparing with analyzing their γ ray .关键词
探测灵敏度/放射性氙同位素/贝叶斯方法/最大似然法Key words
detection sensitivity/radioactive xenon isotope/Bayesian approach/maxi-mum likelihood method分类
能源科技引用本文复制引用
李奇,于伟翔,王世联,赵允刚,樊元庆,贾怀茂,张新军,陈占营,刘蜀疆,常印忠..提高 HPGe γ能谱法测量131Xem和133Xem探测灵敏度的方法研究[J].原子能科学技术,2016,50(12):2240-2244,5.基金项目
国家自然科学基金青年基金项目资助 （）
