Analysis of uranium ore composition by calibration-free laser-induced plasma spectroscopy
HE Yun1, GAO Zhixing*1, WANG Yuanhang1, WANG Zhao1, HU Zhenlin2, DAI Mingjian3
1. China Institute of Atomic Energy, Beijing 102413, China; 2. Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China; 3. Geological Party No.208, CNNC, Baotou 014010, China
Abstract：Uranium is the core element in the process of nuclear energy development and application. The rapid and in-situ quantitative analysis of uranium-containing materials is helpful to guarantee the quality and safety of nuclear materials. Laser-induced plasma spectroscopy (LIPS) is a widely concerned technology, which can be used for the rapid and in-situ analysis of uranium elements. Calibration-free laser induced plasma spectroscopy (CF-LIPS) can achieve the quantitative analysis without the dependence of standard samples, which has a unique application value in the rapid quantitative analysis of uranium ore. In this work, CF-LIPS was applied to the in-situ detection of uranium ore samples. The quantitative analysis of U, Si, Fe, Ti, Al, Mg and Ca elements in uranium ore standard was carried out through the establishment of CF-LIPS experimental device and analysis program and the addition of spectral line data of uranium. The plasma electron density and temperature of uranium ore standard substance GBW04101 were calculated by Stark broadening of H-α spectral line and Saha-Boltzmann plot method, which was (8.13±0.52)×1016 cm-3 and (9 776.8±91.5) K, respectively. The results of elemental analysis showed that the relative errors of the above seven elements were all less than 10%. The results showed that the CF-LIPS method had a good application prospect and value in the analysis of uranium-containing substances.
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