Evaluation of uranium transitions for isotopically-selective laser induced fluorescence with diode lasers (Technical Report for ST064)

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Isotopically-selective excitation of uranium atoms by diode lasers can be the basis for a portable instrument to perform uranium isotopic assays in the field. Such an instrument would improve the ability of on-site inspections to detect and deter nuclear proliferation. Published and unpublished spectroscopic data on atomic uranium were examined to identify candidate transitions for isotopically-selective laser excitation with diode lasers. Eleven candidate transitions were identified and evaluated for their potential usefulness for a portable uranium assay instrument. Eight of these transitions are suitable for laser induced fluorescence using different excitation and detection wavelengths, which will improve sensitivity and elemental ... continued below

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40 p.

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Cannon, B.D. October 1, 1993.

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  • Pacific Northwest Laboratory
    Publisher Info: Pacific Northwest Lab., Richland, WA (United States)
    Place of Publication: Richland, Washington

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Description

Isotopically-selective excitation of uranium atoms by diode lasers can be the basis for a portable instrument to perform uranium isotopic assays in the field. Such an instrument would improve the ability of on-site inspections to detect and deter nuclear proliferation. Published and unpublished spectroscopic data on atomic uranium were examined to identify candidate transitions for isotopically-selective laser excitation with diode lasers. Eleven candidate transitions were identified and evaluated for their potential usefulness for a portable uranium assay instrument. Eight of these transitions are suitable for laser induced fluorescence using different excitation and detection wavelengths, which will improve sensitivity and elemental selectivity. Data sheets on the 25 uranium transitions in the wavelength range 629 nm to 1,000 nm that originate in the ground or first excited states of neutral atomic uranium are included. Each data sheet provides the wavelength, upper and lower energy levels, angular momentum quantum numbers, {sup 235}U isotope shift (relative to {sup 238}U), and high-resolution spectra of weapons-grade uranium (93% {sup 235}U and 7% {sup 238}U).

Physical Description

40 p.

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OSTI as DE94002000

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  • Other Information: PBD: Oct 1993

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  • Other: DE94002000
  • Report No.: PNL--8864
  • Grant Number: AC06-76RL01830
  • DOI: 10.2172/139847 | External Link
  • Office of Scientific & Technical Information Report Number: 139847
  • Archival Resource Key: ark:/67531/metadc624871

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Office of Scientific & Technical Information Technical Reports

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  • October 1, 1993

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • April 7, 2016, 2:39 p.m.

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Cannon, B.D. Evaluation of uranium transitions for isotopically-selective laser induced fluorescence with diode lasers (Technical Report for ST064), report, October 1, 1993; Richland, Washington. (digital.library.unt.edu/ark:/67531/metadc624871/: accessed October 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.