Abstract
WE have recently investigated the vibration-rotation spectrum of acetylene in the near infra-red. This absorption spectrum has been photographed in the first order of the 21 ft. Rowland concave grating which has been recently set up in a Runge-Paschen mounting Various lengths of absorbing gas have been used, namely, 3, 6, and 9 metres, at atmospheric pressure. Employing the new Kodak zenocyanine infra-red plates, we have been able to extend our investigations beyond 1μ.
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References
K. Hedfeld and K. Mecke, Z. f. Phys., 64, 151; 1930.
B. Badger, Phys. Rev., 35, 1433; 1930.
M. Dennison, Rev. Mod. Phys., 3, 280; 1931.
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LOCHTE-HOLTGREVEN, W., EASTWOOD, E. New Infra-Red Bands Photographed in the Absorption Spectrum of Acetylene. Nature 130, 403 (1932). https://doi.org/10.1038/130403a0
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DOI: https://doi.org/10.1038/130403a0
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