Adaptive femtosecond laser-induced breakdown spectroscopy of uranium

Ko, Phyllis; Hartig, Kyle C.; McNutt, Jessica; Schur, R.; Jacomb-Hood, T W; Jovanovic, Igor

doi:10.1063/1.4779042

Cited by 18 publications

(11 citation statements)

References 21 publications

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“…According to Figure 9, negligible differences exist in shockwave propagation throughout the first 20 µs of plasma/shock evolution between the two ambient gases. Distance and speed trends are consistent with those reported by Hough et al [26] using O 2 as ambient gas. Notably, the shockwaves persist beyond a period of 20 µs after ablation; however, camera chip size and image magnification impose limits on tracking beyond this point, as the shockwave travels outside the frame.…”

Section: Plume Confinement Investigated Through Shadowgraphysupporting

confidence: 90%

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Significance of ambient conditions in uranium absorption and emission features of laser ablation plasmas

Skrodzki

Shah

Taylor

et al. 2016

Spectrochimica Acta Part B: Atomic Spectroscopy

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This study employs laser ablation (LA) to investigate mechanisms for U optical signal variation under various environmental conditions during laser absorption spectroscopy (LAS) and optical emission spectroscopy (OES). Potential explored mechanisms for signal quenching related to ambient conditions include plasma chemistry (e.g., uranium oxide formation), ambient gas confinement effects, and other collisional interactions between plasma constituents and the ambient gas. LA-LAS studies show that the persistence of the U ground state population is significantly reduced in the presence of air ambient compared to nitrogen. LA-OES yields congested spectra from which the U I 356.18 nm transition is prominent and serves as the basis for signal tracking. LA-OES signal and persistence vary negligibly between the test gases (air and N 2 ), unlike the LA-LAS results. The plume hydrodynamic features and plume fundamental properties showed similar results in both air and nitrogen ambient. Investigation of U oxide formation in the laser-produced plasma suggests that low U concentration in a sample hinders consistent detection of UO molecular spectra.

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Section: Plume Confinement Investigated Through Shadowgraphysupporting

confidence: 90%

“…Limited studies exist on the practicality of LA-OES for U identification [3,13,16,19]. Notably, LA-OES proves practical in detecting isotopic shifts of elements including U [21][22][23][24][25][26][27]. Reported U detection limits employing LA-OES are on the order of parts per million (ppm) [20,28,29].…”

Section: Introductionmentioning

confidence: 99%

Significance of ambient conditions in uranium absorption and emission features of laser ablation plasmas

Skrodzki

Shah

Taylor

et al. 2016

Spectrochimica Acta Part B: Atomic Spectroscopy

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“…A Ti: sapphire chirped-pulse amplification system was used to generate 40fs pulsed laser which provided 3.5 × 10 15 W/cm 2 intensity. By determining femtosecond pulse shapes that produce the highest intensity line emissions, the sensitivity was increased [7] .Researchers from Los Alamos National Laboratory (LANL)…”

Section: Raw Materials Determinationmentioning

confidence: 99%

“…Meanwhile, femtosecond laser shows distinct advantages. Due to the ultra-short pulse duration, femtosecond-LIPS can achieve high intensity using low pulse energy (several millijoules) and reduce the background to increase signal to noise ratio [7] . Dual-pulse LIPS is another technique commonly applied [8] .…”

Section: Laser Systemmentioning

confidence: 99%

Application of laser induced plasma spectroscopy for nuclear material analysis and detection: a comprehensive review

Han

Gao

et al. 2015

SPIE Proceedings

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With advantages of in-situ, micro-damage, rapid analysis, laser-induced plasma spectroscopy (LIPS) has made a great progress in nuclear analysis and detection. The instrumentation of LIPS mainly consists of laser system, optical system and analysis system. Applications of LIPS to nuclear industry are reviewed, such as international nuclear safeguard, nuclear materials analysis, process monitoring and hazard materials detection.

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“…High resolving power spectrometers tend to be much larger and have more narrow spectral regions but are capable of baseline separation of elemental isotopes [21]. Other novel techniques for the detection and analysis of uranium have been reported by Ko and Jovanovic [30]. In summary, the application, the chemical environment of the sample (matrix), and the quantitative or qualitative needs dictate the system requirements.…”

Section: Introductionmentioning

confidence: 99%

Analysis of geological materials containing uranium using laser-induced breakdown spectroscopy

Barefield

Judge

Campbell

et al. 2016

Spectrochimica Acta Part B: Atomic Spectroscopy

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Laser induced breakdown spectroscopy (LIBS) is a rapid atomic emission spectroscopy technique that can be configured for a variety of applications including space, forensics, and industry. LIBS can also be configured for stand-off distances or in-situ, under vacuum, high pressure, atmospheric or different gas environments, and with different resolving-power spectrometers. The detection of uranium in a complex geological matrix under different measurement schemes is explored in this paper. Although many investigations have been completed in an attempt to detect and quantify uranium in different matrices at in-situ and standoff distances, this work detects and quantifies uranium in a complex matrix under Martian and ambient air conditions. Investigation of uranium detection using a low resolving-power LIBS system at stand-off distances (1.6m) is also reported. The results are compared to an in-situ LIBS system with medium resolving power and under ambient air conditions. Uranium has many thousands of emission lines in the 200-800nm spectral region. In the presence of other matrix elements and at lower concentrations, the limit of detection of uranium is significantly reduced. The two measurement methods (low and high resolving-power spectrometers) are compared for limit of detection (LOD). Of the twentyone potential diagnostic uranium emission lines, seven (409, 424, 434, 435, 436, 591, and 682 nm) have been used to determine the LOD for pitchblende in a dunite matrix using the ChemCam test bed LIBS system. The LOD values determined for uranium transitions in air are 409.013 nm (24700 ppm), 424.167 nm (23780 ppm), 434.169 nm (24390 ppm), 435.574 nm (35880 ppm), 436.205 nm (19340 ppm), 591.539 nm (47310 ppm), and 682.692 nm (18580 ppm). The corresponding LOD values determined for uranium transitions in 7 torr CO 2 are 424.167 nm (25760 ppm), 434.169 nm (40800 ppm), 436.205 nm (32050 ppm), 591.539 nm (15,340 ppm), and 682.692 nm (29080 ppm). The LOD values determine for uranium emission lines using the medium resolving power (10000 λ/ λ) LIBS system for the dunite matrix in air are 409.013 nm (6120 ppm), 424.167 nm (5356 ppm), 434.169 nm (5693 ppm), 435.574 nm (6329 ppm), 436.205 nm (2142 ppm), and 682.692 nm (10741 ppm). The corresponding LOD values determined for uranium transitions in a SiO 2 matrix are 409.013 nm (272 ppm), 424.167 nm (268 ppm), 434.169 nm (402 ppm), 435.574 nm (1067 ppm), 436.205 nm (482 ppm), and 682.692 nm (720 ppm).The impact of spectral resolution, atmospheric conditions, matrix elements, and measurement distances on LOD are discussed. The measurements will assist one in selecting the proper system components based upon the application and the required analytical performance.

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Adaptive femtosecond laser-induced breakdown spectroscopy of uranium

Cited by 18 publications

References 21 publications

Significance of ambient conditions in uranium absorption and emission features of laser ablation plasmas

Significance of ambient conditions in uranium absorption and emission features of laser ablation plasmas

Application of laser induced plasma spectroscopy for nuclear material analysis and detection: a comprehensive review

Analysis of geological materials containing uranium using laser-induced breakdown spectroscopy

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