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 nuclear power, including the measurement of isotope ratios. One such important application of LIBS is the measurement 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 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 LIBS of uranium in ambient air. Furthermore, 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, Idaho Falls, ID (United States); Univ. of Michigan, Ann Arbor, MI (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- AC07-05ID14517; NA0002534
- OSTI ID:
- 1252732
- Report Number(s):
- INL/JOU--15-36251; PII: S0584854715002967
- Journal Information:
- Spectrochimica Acta. Part B, Atomic Spectroscopy, Journal Name: Spectrochimica Acta. Part B, Atomic Spectroscopy Journal Issue: C Vol. 116; ISSN 0584-8547
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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