The absorption spectrum of methane has been measured from 2470 to 3200 cm with a high-resolution infrared spectrometer. Pressures from 0.01 to 4.5 cm of the gas were used in order to observe both intense and weak lines. A total of 2,460 lines were measured in the entire region. The band at 3018 cm was measured at very slow scanning rates and the lines of the and branches were resolved into several components. The observed spectrum is shown in five figures.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5287146PMC
http://dx.doi.org/10.6028/jres.064A.021DOI Listing

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