Spectral studies of cold UF6 solutions

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Absorption spectra of UF6 dissolved in liquid xenon, krypton, nitrous oxide, and methane have been obtained between 300 and 500 nm and between 400 and 4000 cm−1. Eighteen infrared bands of UF6 were observed and were moderately (2–9 cm−1 FWHM) narrow. The band positions were found to move toward higher wave numbers ν̃ as the temperature T was increased; dν̃/dT∼0.02 cm−1/°C for the bands examined. Some anharmonicity constants were determined and were within experimental error of previous values for UF6 vapor. Integrated absorption cross sections for the ν3, ν5+ν3, ν2+ν3, and ν1+ν3 bands of UF6 were measured to be ≊1×10−16, 1.8×10−19, 5.8×10−19, and 3.9×10−19 cm2–cm−1, respectively. The solubilities of UF6 in liquid xenon, krypton, and methane have been measured.