期刊
SCIENTIFIC REPORTS
卷 7, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41598-017-03865-9
关键词
-
资金
- U.S. DOE by the Battelle Memorial Institute [DE-AC05-76RLO1830]
- National Nuclear Security Administration (NNSA), Defense Nuclear Nonproliferation RD Office
- DOE/NNSA Consortium for Verification Technology [DE-NA0002534]
- Department of Homeland Security [2012.05 DN-130-NF0001]
We demonstrate measurement of uranium isotopes in femtosecond laser ablation plumes using two-dimensional fluorescence spectroscopy (2DFS). The high-resolution, tunable CW-laser spectroscopy technique clearly distinguishes atomic absorption from U-235 and U-238 in natural and highly enriched uranium metal samples. We present analysis of spectral resolution and analytical performance of 2DFS as a function of ambient pressure. Simultaneous measurement using time-resolved absorption spectroscopy provides information on temporal dynamics of the laser ablation plume and saturation behavior of fluorescence signals. The rapid, non-contact measurement is promising for in-field, standoff measurements of uranium enrichment for nuclear safety and security.
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