激光诱导击穿光谱技术检测铀材料中微量杂质元素  

Detection of Trace Impurities in Uranium Using Laser Induced Breakdown Spectroscopy

作　　者：徐钦英[1] 张永彬[1] 王怀胜[1] 贾建平[1] 

机构地区：[1]表面物理与化学重点实验室,四川绵阳621907

出　　处：《中国激光》2015年第3期318-323,共6页Chinese Journal of Lasers

基　　金：表面物理与化学重点实验室基金(9140C6601010903);四川材料与工艺研究所所长基金(SJ200814)

摘　　要：研究了利用激光诱导击穿光谱技术对铀材料中杂质元素进行快速定量分析的方法。利用Kr F准分子激光器和Ava Spec-2048光纤光谱仪组建了激光诱导击穿光谱系统,检测并分析了200--460 nm波长范围内铀及杂质元素的光谱数据。分别研究了脉冲激光次数、光谱仪检测延迟时间等因素对铀光谱特性的影响。在激光能量为28 m J、延迟时间为1.5μs时对铀材料中的Fe、Cu、Al三种杂质元素进行定量分析,特征光谱分别选择438.3、427.5、396.2 nm,定量测量相对误差小于12%。实验结果表明激光诱导击穿光谱技术在检测铀材料中微量杂质元素时具有较低的相对误差和检出限,可以用于铀材料中杂质元素的快速定量分析。Feasibility of rapid quantitative analysis for trace impurities in uranium materials is studied using laser induced breakdown spectroscopy（LIBS）. LIBS system is set up with a Kr F excimer laser and an Ava Spec-2048 fiber optic spectrometer. Spectral data both of uranium and impurity elements are detected and analyzed in a range of 200~460 nm wavelength. The influence of pulse number and delay time of spectrometer detection on the characteristics of uranium and impurity elements is investigated respectively. Three kinds of impurity elements Fe, Cu and Al in uranium are quantitatively analyzed with characteristic spectra at 438.3, 427.5,396.2 nm respectively. The relative error of quantitative measurement is less than 12% when the laser energy is28 m J and time delay is 1.5 μs. The experimental results show that laser induced breakdown spectroscopy which has relatively lower relative error and limit of detection can be used for rapid quantitative analysis of trace impurity elements in uranium materials.

关 键 词：光谱学 激光诱导击穿光谱 定量分析 铀 杂质元素 

分 类 号：O433.4[机械工程—光学工程]