Measurements of the isotopic composition of UF6 according to the fine structure of the IR absorption spectrum in the ν1 + ν3 band
| Autor: | Sh. Sh. Nabiev, G. Yu. Grigor’ev, D. B. Stavrovskii, P. L. Men’shikov, V. M. Semenov, L. I. Men’shikov |
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| Rok vydání: | 2017 |
| Předmět: |
Absorption spectroscopy
Spectrometer 020209 energy Anharmonicity Analytical chemistry 02 engineering and technology 021001 nanoscience & nanotechnology Laser Hot band Spectral line law.invention chemistry.chemical_compound Uranium hexafluoride chemistry law 0202 electrical engineering electronic engineering information engineering Physical and Theoretical Chemistry 0210 nano-technology Quantum cascade laser |
| Zdroj: | Russian Journal of Physical Chemistry B. 11:61-76 |
| ISSN: | 1990-7923 1990-7931 |
| DOI: | 10.1134/s1990793117010286 |
| Popis: | 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 X21, X31, and X32 and their combinations Xi1 + Xi3 (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. |
| Databáze: | OpenAIRE |
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