Hybrid interferometric/dispersive atomic spectroscopy of laser-induced uranium plasma
- The Pennsylvania State Univ., University Park, PA (United States)
- Idaho National Lab. (INL), Idaho Falls, ID (United States)
An established optical emission spectroscopy technique, laser-induced breakdown spectroscopy (LIBS), holds promise for detection and rapid analysis of elements relevant for nuclear safeguards, nonproliferation, and nucle-ar power, including the measurement of isotope ratios. One such important application of LIBS is the measure-ment of uranium enrichment (235U/238U), 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 in-expensive and compact Fabry–Perot etalon integrated with a low to moderate resolution Czerny–Turner spec-trometer, to achieve the resolution needed for isotope selectivity of LIBS of uranium in ambient air. Spectral line widths of ~10 pm have been measured at a center wavelength 424.437 nm, clearly discriminating the natural from the highly enriched uranium.
- Research Organization:
- Idaho National Laboratory (INL), Idaho Falls, ID (United States); Univ. of Michigan, Ann Arbor, MI (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- 2012-DN-130-NF0001-02; AC07-05ID14517; NA0002534
- OSTI ID:
- 1252732
- Alternate ID(s):
- OSTI ID: 1359834; OSTI ID: 1367563
- Report Number(s):
- INL/JOU-15-36251; PII: S0584854715002967
- Journal Information:
- Spectrochimica Acta. Part B, Atomic Spectroscopy, Vol. 116, Issue C; ISSN 0584-8547
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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