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Standoff analysis of laser-produced plasmas using laser-induced fluorescence

Journal Article · · Optics Letters
DOI:https://doi.org/10.1364/OL.43.001055· OSTI ID:1502423
We report the use of laser-induced fluorescence (LIF) of laser ablation plumes for standoff applications. The standoff analysis of Al species, as major and minor species in samples, is performed in a nanosecond laser-produced plasma created at a distance ~10 m. The LIF analysis is performed by resonantly exciting an Al transition at 394.4 nm using a continuous wave (cw) tunable laser and by collecting the direct-line fluorescence signal at 396.15 nm. The spectral resolution of LIF is obtained by scanning the cw tunable LIF laser across the selected Al transition. Our results highlight that LIF provides enhanced signal intensity, emission persistence, and spectral resolution when compared to thermally-excited emission, and these are crucial considerations for using laser-produced plasma for standoff isotopic analysis.
Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation (NA-20)
DOE Contract Number:
AC05-76RL01830
OSTI ID:
1502423
Report Number(s):
PNNL-SA-130891
Journal Information:
Optics Letters, Journal Name: Optics Letters Journal Issue: 5 Vol. 43; ISSN 0146-9592; ISSN OPLEDP
Publisher:
Optical Society of America (OSA)
Country of Publication:
United States
Language:
English

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