利用HPGe铀能谱88～100keV能区确定铀富集度方法研究  

Research on Uranium Enrichment Determination Using 88-100 keV Region of HPGe Uranium Spectrum

作　　者：周浩[1] 赵永刚[1] 李建华[1] 金惠民[1] 

机构地区：[1]中国原子能科学研究院放射化学研究所,北京102413

出　　处：《原子能科学技术》2014年第7期1159-1164,共6页Atomic Energy Science and Technology

摘　　要：利用铀材料γ能谱88-100 keV能区中γ、X射线重峰分解确定同位素丰度的方法，是铀同位素分析商用软件MGAU、MGA＋＋等的核心技术。本文建立了γ、X射线峰形模型，提出了效率拟合因子修正效率的方法，并自行编写了铀富集度分析程序。用 H PGe γ谱仪对两种化学形态、铀富集度范围为1.80％-90.1％的铀样品进行了测量，以验证自编程序的可行性。利用本文所编写的程序分析实验能谱，得到的芯块样品分析结果与标称值的相对偏差小于2％，粉末样品分析结果与标称值的相对偏差小于1％。T he method w hich is used to determine uranium enrichment by deconvoluting complex peak clusters in 88-100 keV region of γ/X spectrum of uranium materials is the key technique of some uranium enrichment determination software ,such as MGAU , MGA ＋ ＋ ,etc .According to the basic principle of this method ,a code to analyze the spectrum was written ,in which peak shape model of γ/X ray was built to fit the spec-trum and efficiency fitting factor was developed to make efficiency correction . Two types of uranium samples with enrichment ranging from 1.80% to 90.1% were meas-ured by a HPGe detector and analyzed by the code . For the samples measured , the uranium enrichment was determined with relative deviation of about 2% for pellet and 1% for pow der samples .

关 键 词：铀富集度测量 峰形模型 重峰分解 

分 类 号：O657.35[理学—分析化学]