Abstract
UP to the present, two methods have been chiefly used for observing in the laboratory the ‘cometary emission bands’ at 4050 A. assigned to CH2. Herzberg1, who was the first to excite these bands, used an interrupted discharge through methane, and Herman2 succeeded in photographing the bands with higher dispersion, using a discharge between carbon rods in an atmosphere of hydrogen diluted with a rare gas. The presence of the 4050 group was also reported in an ordinary discharge through diazomethane and ketene by Goldfinger, Le Goff and Letort3. No analysis of the bands has hitherto been attempted.
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References
Herzberg, Astrophys. J., 96, 314 (1942).
Herman, C.R. Acad. Sci., Paris, 223, 281 (1946).
Goldfinger, Le Goff and Letort, C.R. Acad. Sci., Paris, 227, 632 (1948).
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MONFILS, A., ROSEN, B. New Method of Excitation of the Cometary Emission Bands at 4050 A. Nature 164, 713 (1949). https://doi.org/10.1038/164713a0
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DOI: https://doi.org/10.1038/164713a0
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