Analysis of uranium ore composition by calibration-free laser-induced plasma spectroscopy
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 technolo-gy,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 calculat-ed 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 er-rors 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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