期刊
APPLIED SPECTROSCOPY
卷 67, 期 11, 页码 1275-1284出版社
SOC APPLIED SPECTROSCOPY
DOI: 10.1366/13-07066
关键词
Laser-induced breakdown spectroscopy; LIBS; Laser ablation; Uranium; Spectral interference
资金
- Defense Threat Reduction Administration (DTRA) of the U.S. Department of Defense [LB09005541, LB09005541A]
- U.S. Department of Energy, National Nuclear Security Administration (NNSA) at the Lawrence Berkeley National Laboratory [DE-AC02-05CH11231]
Laser-induced breakdown spectroscopy (LIBS) has been evaluated for the determination of uranium in real-world samples such as uraninite. NIST Standard Reference Materials were used to evaluate the spectral interferences on detection of uranium. The study addresses the detection limit of LIBS for several uranium lines and their relationship to non-uranium lines, with emphasis on spectral interferences. The data are discussed in the context of optimizing the choice of emission lines for both qualitative and quantitative analyses from a complex spectrum of uranium in the presence of other elements. Temporally resolved spectral emission intensities, line width, and line shifts were characterized to demonstrate the parameter influence on these measurements. The measured uranium line width demonstrates that LIBS acquired with moderately high spectral resolution (e.g., by a 1.25 m spectrometer with a 2400 grooves/mm grating) can be utilized for isotope shift measurements in air at atmospheric pressure with single to tens of parts per million (ppm) level detection limits, as long as an appropriate transition is chosen for analysis.
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