Evolution of the composition of nanoparticles formed by the nanosecond Nd:YAG laser irradiation of an aluminium target in N2–O2 gas mixtures

Lavisse, L.; Girault, M.; Berger, Pascal; Jouvard, Jean-Marie; Garrec, Jean-Luc Le; Carvou, Erwann; Ouf, F. X.; Calvo, F.; Yu, Jianhua; Förster, Georg Daniel; Potin, Valérie; Bourgeois, S.; Lucas, M.C. Marco de; Mitchell, James B.

doi:10.1007/s00339-017-1283-9

Cited by 3 publications

(1 citation statement)

References 39 publications

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“…The morphology of particles is related to the type, pressure and temperature of ambient [10][11][12][13][14][15][16][17][18][19] . Zhang et al investigated morphology characteristic of uranium particles generated with laser ablation [20] .…”

Section: Introductionmentioning

confidence: 99%

Generation of uranium aerosol with laser ablation to simulate nuclear facilities emission

Gao

et al. 2022

Sixth International Symposium on Laser Interaction With Matter

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Nuclear aerosol simulant generated in laboratory plays a unique role for the development of in-situ monitoring technology of nuclear facility emission. To simulate the emission of the trace uranium aerosol, an aerosol generator based on laser ablation was set up and tested experimentally. It is shown that the concentration of aerosol particles has a linear relationship in the range of 36.28 μg/m3 to 277.13 μg/m3 while the laser intensity keeps above 7.6×106 W/cm2 . The aerosol particle size distribution is stable, while the most particles are inhalable particles based on the measurement of an aerosol spectrometer. The composition is verified with a laser induced plasma spectroscopy. Several spectral lines of uranium have been clearly identified. It is demonstrated that aerosols generated based on laser ablation can simulate nuclear facilities emission effectively. The method will be used in further work to develop direct radioactive aerosol monitoring technology.

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Section: Introductionmentioning

confidence: 99%

Generation of uranium aerosol with laser ablation to simulate nuclear facilities emission

Gao

et al. 2022

Sixth International Symposium on Laser Interaction With Matter

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Platinum and platinum oxide nanoparticles generated by unipolar spark discharge

Němec

Šonský

Gruber

et al. 2020

Journal of Aerosol Science

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Plume dynamics and gas-phase molecular formation in transient laser-produced uranium plasmas

et al. 2019

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The dynamics of expansion, thermodynamics, and chemical reactions in laser-produced plasmas is of general interest for all laser ablation applications. This study investigates the complex morphology and behavior of reactive species in nanosecond laser-produced uranium plasmas. Comparing plasma morphology in various inert and reactive ambient gases provides information about the role of gas-phase chemistry in plume hydrodynamics. Background gases including nitrogen and argon foster collisional interactions leading to more significant plume confinement and the increase in persistence of uranium species. On the other hand, environments containing reactive gases such as oxygen promote chemical reactions between the plasma and ambient species. By comparing the expansion dynamics of uranium plumes in nitrogen, air, and argon, we discover that chemical reactions modify the hydrodynamics of the plume at later times of its evolution in the air background. Furthermore, we observe that varying the concentration of oxygen in the fill gas promotes different reaction pathways that lead to the formation of uranium oxides. The reaction pathways from atoms to diatomic to polyatomic molecules strongly vary with ambient oxygen concentration. Lower oxygen concentrations enhance the formation of uranium monoxide from atomic uranium, whereas higher oxygen concentrations tend to depopulate both atomic uranium and uranium monoxide concentrations through the formation of more complex uranium oxides.

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Evolution of the composition of nanoparticles formed by the nanosecond Nd:YAG laser irradiation of an aluminium target in N2–O2 gas mixtures

Abstract: International audienc

Cited by 3 publications

References 39 publications

Generation of uranium aerosol with laser ablation to simulate nuclear facilities emission

Generation of uranium aerosol with laser ablation to simulate nuclear facilities emission

Platinum and platinum oxide nanoparticles generated by unipolar spark discharge

Plume dynamics and gas-phase molecular formation in transient laser-produced uranium plasmas

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