Abstract
A NUMBER of weak bands have been noted in sources of carbon molecular spectra by Johnson1 and by Fox and Herzberg2. Because of their association with carbon spectra, these bands were attributed to the carbon molecule, and several of the stronger ones (λλ 4770, 4836, 4911, 4997) tentatively identified as tail-bands of the Swan system. Measurements of the isotopic heads of the first three of these bands obtained from carbon enriched in the heavy isotope give some information concerning their nature and display an anomalously large isotopic shift.
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References
Johnson, R. C., Phil. Tran. Roy. Soc., A, 226, 157 (1926).
Fox, J. G., and Herzberg, G., Phys. Rev., 52, 638 (1937).
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TOWNES, C. Apparent Anomalous Isotopic Effect in Some Bands Associated with the Swan Bands. Nature 144, 631 (1939). https://doi.org/10.1038/144631a0
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DOI: https://doi.org/10.1038/144631a0
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