期刊
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
卷 116, 期 -, 页码 58-62出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.sab.2015.12.006
关键词
Laser-induced breakdown spectroscopy; Uranium; Isotopes; Fabry-Perot
类别
资金
- National Nuclear Security Administration's Next Generation Safeguards Initiative (NGSI)
- U.S. Department of Homeland Security [2012-DN-130-NF0001-02]
- U.S. Department of Energy under DOE Idaho Operations Office [DE-AC07-051D14517]
- Consortium for Verification Technology under Department of Energy National Nuclear Security Administration [DE-NA0002534]
An established optical emission spectroscopy technique, laser-induced breakdown spectroscopy (LIES), holds promise for detection and rapid analysis of elements relevant for nuclear safeguards, nonproliferation, and nuclear power, including the measurement of isotope ratios. One such important application of LIBS is the measurement of uranium enrichment (U-235/U-238), which requires high spectral resolution (e.g., 25 pm for the 424.4 nm U II line). High-resolution dispersive spectrometers necessary for such measurements are typically bulky and expensive. We demonstrate the use of an alternative measurement approach, which is based on an inexpensive and compact Fabry-Perot etalon integrated with a low to moderate resolution Czerny-Turner spectrometer, to achieve the resolution needed for isotope selectivity of LIES of uranium in ambient air. Spectral line widths of similar to 10 pm have been measured at a center wavelength 424.437 nm, clearly discriminating the natural from the highly enriched uranium. (C) 2015 Elsevier B.V. All rights reserved.
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