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Title: Hybrid interferometric/dispersive atomic spectroscopy of laser-induced uranium plasma

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.
Authors:
 [1] ;  [2] ;  [1]
  1. The Pennsylvania State Univ., University Park, PA (United States)
  2. Idaho National Lab. (INL), Idaho Falls, ID (United States)
Publication Date:
Report Number(s):
INL/JOU-15-36251
Journal ID: ISSN 0584-8547; PII: S0584854715002967
Grant/Contract Number:
2012-DN-130-NF0001-02; AC07-05ID14517; NA0002534
Type:
Accepted Manuscript
Journal Name:
Spectrochimica Acta. Part B, Atomic Spectroscopy
Additional Journal Information:
Journal Volume: 116; Journal Issue: C; Journal ID: ISSN 0584-8547
Publisher:
Elsevier
Research Org:
Idaho National Lab. (INL), Idaho Falls, ID (United States); Univ. of Michigan, Ann Arbor, MI (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; laser-induced breakdown spectroscopy; uranium; isotopes; Fabry–Perot
OSTI Identifier:
1252732
Alternate Identifier(s):
OSTI ID: 1359834; OSTI ID: 1367563