Direct uranium enrichment assay in gaseous uranium hexafluoride with laser induced breakdown spectroscopy

Chan, George C.-Y.; Mao, Xianglei; Martin, Leigh R.; Trowbridge, Lee D.; Russo, Richard E.

doi:10.1007/s10967-022-08215-2

Title: Direct uranium enrichment assay in gaseous uranium hexafluoride with laser induced breakdown spectroscopy

Journal Article · 19 February 2022 · Journal of Radioanalytical and Nuclear Chemistry

DOI: https://doi.org/10.1007/s10967-022-08215-2 · OSTI ID:2475733

Chan, George C.-Y. ^[1]; Mao, Xianglei ^[1];

^[2];

^[2]; Russo, Richard E. ^[3]

Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Applied Spectra, Inc., West Sacramento, CA (United States)

A set of eleven U atomic emission lines, between 421.099 and 421.460 nm, were characterized for direct enrichment assay of gaseous UF₆ samples with laser induced breakdown spectroscopy (LIBS). Several iterative, multivariate nonlinear spectral-fitting algorithms were evaluated for their efficacies to extract the enrichment information from the measured LIBS spectra. Furthermore, wavelength-dependent weight factors, which take into consideration of the spectral-line position in the fitting model, the determined isotopic ratio, and the isotopic shift of the emission line, are essential for the spectral-fitting model to function adequately. The analytical accuracies and precision were typically within 0.5% in absolute [²³⁵U/(²³⁵U + ²³⁸U)] ratios.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation

Grant/Contract Number:: AC02-05CH11231; AC05-00OR22725

OSTI ID:: 2475733

Journal Information:: Journal of Radioanalytical and Nuclear Chemistry, Journal Name: Journal of Radioanalytical and Nuclear Chemistry Journal Issue: 3 Vol. 331; ISSN 0236-5731

Publisher:: SpringerCopyright Statement

Country of Publication:: United States

Language:: English

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Title: Direct uranium enrichment assay in gaseous uranium hexafluoride with laser induced breakdown spectroscopy

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