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The infrared spectrum of CO2 in the region of 2.7μ has been remeasured. Five rotation-vibration bands have been identified and analyzed in detail. One of these is due to C13O2. The rotational constants obtained were B000=0.3904 cm−1 and D000=0.25×10−6 cm−1.In two of the bands l-type doubling occurs, and the values of the splitting constants q were determined.
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France et al. (1955) studied this question.
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