Analysis of uranium solutions using Laser-induced Breakdown Spectroscopy

The application of laser-induced breakdown spectroscopy (LIBS) to the measurement of the uranium content in solution is under investigation. This method utilizes a focused laser pulse to produce a hot spark that vaporizes the solution and generates a plasma of electrons and excited ions and neutral atoms. Spectral and temporal resolution of the plasma light permits identification of the atomic constituents. The LIBS technique has several potential advantages compared to conventional methods. No sample handling or preparation is needed because only optical access is required to produce and observe the plasma. The technique is fast because the laser spark simultaneously vaporizes and excites the sample. In addition, LIBS is unaffected by gamma-ray signals from high concentrations of fission products. This report presents the results of an investigation of the suitability of LIBS for analysis of uranium solutions. Topics discussed include dynamic range, precision, detection limit, and the effects of some experimental parameters on the analysis