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In a recent contribution, (Gao B, Kassi S, Campargue A. Empirical low energy values for methane transitions in the 5852–6181cm −1 region by absorption spectroscopy at 81K. J Mol Spectrosc 2009;253:55–63.), the low energy values of methane transitions between 1.71 and 1.62μm were derived from the variation of the line intensities between 296 and 81K. The line intensities at 81K were retrieved...
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