Assay measurement of gaseous UF6 using femtosecond laser-induced breakdown spectroscopy in the 424.4 nm spectral region

Jordan, Ben; Readle, Jason D.; Cooper, Joel; Cook, Matthew; Hayward, Jason P.; Hartman, J. Daniel; Forrest, Dean; Hall, Howard L.

doi:10.1016/j.anucene.2022.109523

Cited by 4 publications

(3 citation statements)

References 35 publications

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“…265–269 Jordan et al report an analogous study using fs-LIBS in an attempt to achieve greater stability with the gaseous measurements over a larger pressure range. 270 Both groups used multivariate nonlinear spectral fittings to derive enrichment directly from the spectra without calibration samples.…”

Section: Laser-induced Breakdown Spectroscopy (Libs) Throughout the Nfcmentioning

confidence: 99%

Laser Ablation Plasmas and Spectroscopy for Nuclear Applications

Kwapis,

Borrero,

Latty

et al. 2023

Appl Spectrosc

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The development of measurement methodologies to detect and monitor nuclear-relevant materials remains a consistent and significant interest across the nuclear energy, nonproliferation, safeguards, and forensics communities. Optical spectroscopy of laser-produced plasmas is becoming an increasingly popular diagnostic technique to measure radiological and nuclear materials in the field without sample preparation, where current capabilities encompass the standoff, isotopically resolved and phase-identifiable (e.g., UO and UO[Formula: see text]) detection of elements across the periodic table. These methods rely on the process of laser ablation (LA), where a high-powered pulsed laser is used to excite a sample (solid, liquid, or gas) into a luminous microplasma that rapidly undergoes de-excitation through the emission of electromagnetic radiation, which serves as a spectroscopic fingerprint for that sample. This review focuses on LA plasmas and spectroscopy for nuclear applications, covering topics from the wide-area environmental sampling and atmospheric sensing of radionuclides to recent implementations of multivariate machine learning methods that work to enable the real-time analysis of spectrochemical measurements with an emphasis on fundamental research and development activities over the past two decades. Background on the physical breakdown mechanisms and interactions of matter with nanosecond and ultrafast laser pulses that lead to the generation of laser-produced microplasmas is provided, followed by a description of the transient spatiotemporal plasma conditions that control the behavior of spectroscopic signatures recorded by analytical methods in atomic and molecular spectroscopy. High-temperature chemical and thermodynamic processes governing reactive LA plasmas are also examined alongside investigations into the condensation pathways of the plasma, which are believed to serve as chemical surrogates for fallout particles formed in nuclear fireballs. Laser-supported absorption waves and laser-induced shockwaves that accompany LA plasmas are also discussed, which could provide insights into atmospheric ionization phenomena from strong shocks following nuclear detonations. Furthermore, the standoff detection of trace radioactive aerosols and fission gases is reviewed in the context of monitoring atmospheric radiation plumes and off-gas streams of molten salt reactors. Finally, concluding remarks will present future outlooks on the role of LA plasma spectroscopy in the nuclear community.

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Section: Laser-induced Breakdown Spectroscopy (Libs) Throughout the Nfcmentioning

confidence: 99%

Laser Ablation Plasmas and Spectroscopy for Nuclear Applications

Kwapis,

Borrero,

Latty

et al. 2023

Appl Spectrosc

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“…A recent paper 1 reports the computation of assay values in samples of fs-LIBS data for a gaseous UF 6 material by applying multivariate nonlinear spectral fitting (MVNLSF). 2 MVNLSF uses predetermined reference isotopic shifts and fitness of multiple Lorentzian distributions.…”

Section: Introductionmentioning

confidence: 99%

Classification of gaseous UF₆ assay by femtosecond LIBS in the 424.4 nm spectral region using numerical HOGSVD-DTW features

Jordan¹,

Thomason²,

Readle³

et al. 2023

J. Anal. At. Spectrom.

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“…Filamentation has also been used to induce the laser-induced fluorescence of UO 2 F 2 solution [37]. Furthermore, a technique based on a femtosecond laser and plasma spectroscopy was used to measure the isotopic composition of UF 6 using optical signatures in the 424.4 nm spectral region [38]. The results were in good agreement with the actual isotopic composition of the samples, reporting values within 0.28% of the actual 235 U content of the samples and a standard deviation of 0.90%.…”

Section: Introductionmentioning

confidence: 99%

Ultrafast Laser-Excited Optical Emission of Xe under Loose-Focusing Conditions

Burger,

Latty,

Frigerio

et al. 2023

Sensors

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The optical filament-based radioxenon sensing can potentially overcome the constraints of conventional detection techniques that are relevant for nuclear security applications. This study investigates the spectral signatures of pure xenon (Xe) when excited by ultrafast laser filaments at near-atmosphericpressure and in short and loose-focusing conditions. The two focusing conditions lead to laser intensity differences of several orders of magnitude and different plasma transient behavior. The gaseous sample was excited at atmospheric pressure using ∼7 mJ pulses with a 35 fs pulse duration at 800 nm wavelength. The optical signatures were studied by time-resolved spectrometry and imaging in orthogonal light collection configurations in the ∼400 nm (VIS) and ∼800 nm (NIR) spectral regions. The most prominent spectral lines of atomic Xe are observable in both focusing conditions. An on-axis light collection from an atmospheric air–Xe plasma mixture demonstrates the potential of femtosecond filamentation for the remote sensing of noble gases.

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Assay measurement of gaseous UF6 using femtosecond laser-induced breakdown spectroscopy in the 424.4 nm spectral region

Cited by 4 publications

References 35 publications

Laser Ablation Plasmas and Spectroscopy for Nuclear Applications

Laser Ablation Plasmas and Spectroscopy for Nuclear Applications

Classification of gaseous UF₆ assay by femtosecond LIBS in the 424.4 nm spectral region using numerical HOGSVD-DTW features

Ultrafast Laser-Excited Optical Emission of Xe under Loose-Focusing Conditions

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Assay measurement of gaseous UF6 using femtosecond laser-induced breakdown spectroscopy in the 424.4 nm spectral region

Cited by 4 publications

References 35 publications

Laser Ablation Plasmas and Spectroscopy for Nuclear Applications

Laser Ablation Plasmas and Spectroscopy for Nuclear Applications

Classification of gaseous UF6 assay by femtosecond LIBS in the 424.4 nm spectral region using numerical HOGSVD-DTW features

Ultrafast Laser-Excited Optical Emission of Xe under Loose-Focusing Conditions

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Classification of gaseous UF₆ assay by femtosecond LIBS in the 424.4 nm spectral region using numerical HOGSVD-DTW features