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Measurements of the isotopic composition of UF6 according to the fine structure of the IR absorption spectrum in the ν1 + ν3 band

  • Structure of Chemical Compounds. Spectroscopy
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Abstract

Absorption spectra of the Q-branch of the ν1 + ν3 vibrational–rotational band of uranium hexafluoride (UF6) recorded in a range of 1290.0–1292.5 cm–1 using a laser spectrometer based on a quantum cascade laser have been studied. The spectra of samples with a natural isotopic composition (0.7% U235), an enriched sample (90% U235), and their gas mixtures (2, 5, and 20% U235) in a pressure range of 10–70 Torr at a temperature of T = 296 K have been analyzed. The experiments have revealed a highly reproducible fine structure of the recorded spectra. Periodic singularities in the fine-structure spectra have been interpreted as a manifestation of hot band transitions near the Q-branch. Anharmonicity constants X 21, X 31, and X 32 and their combinations X i1 + X i3 (i = 4, 5, 6) have been determined. The characteristic features in the fine-structure spectra and the initial spectrum have been used to determine the isotopic composition of enriched UF6 samples.

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Authors and Affiliations

  1. Russian Research Center Kurchatov Institute, Moscow, Russia

    Sh. Sh. Nabiev, V. M. Semenov, D. B. Stavrovskii, P. L. Men’shikov, L. I. Men’shikov & G. Yu. Grigor’ev

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  1. Sh. Sh. Nabiev
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  2. V. M. Semenov
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  3. D. B. Stavrovskii
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  4. P. L. Men’shikov
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  5. L. I. Men’shikov
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  6. G. Yu. Grigor’ev
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Correspondence to Sh. Sh. Nabiev.

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Original Russian Text © Sh.Sh. Nabiev, V.M. Semenov, D.B. Stavrovskii, P.L. Men’shikov, L.I. Men’shikov, G.Yu. Grigor’ev, 2017, published in Khimicheskaya Fizika, 2017, Vol. 36, No. 2, pp. 38–54.

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Nabiev, S.S., Semenov, V.M., Stavrovskii, D.B. et al. Measurements of the isotopic composition of UF6 according to the fine structure of the IR absorption spectrum in the ν1 + ν3 band. Russ. J. Phys. Chem. B 11, 61–76 (2017). https://doi.org/10.1134/S1990793117010286

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  • DOI: https://doi.org/10.1134/S1990793117010286

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