Abstract
Although fairly complete information is available regarding the first two systems of bands of Li2, Na2 and K2, the position with regard to the higher systems cannot yet be considered satisfactory. For this reason the spectra of these alkali-metal molecules, in the regions corresponding to the third, fourth and higher systems of bands, have been investigated in absorption, employing a quartz E1 spectrograph for lithium, and a 21-ft. concave grating (Eagle mounting), having a dispersion of 1.3 A. per mm., for sodium and potassium. A hydrogen discharge tube has been used as source of continuum below λ 3600 and a tungsten lamp above that.
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PEARSE, R., SINHA, S. Absorption Bands of Li2, Na2, K2 and NaK. Nature 160, 159 (1947). https://doi.org/10.1038/160159a0
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DOI: https://doi.org/10.1038/160159a0
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