Abstract
PROF. L. VEGARD1 has recently reported the observation of two infra-red lines or band-heads in the auroral spectrum, namely,Pointing out that, since the spectrum shows bands of the N2 second positive system strongly, it might also be expected to contain bands of the N2 first positive system, Prof. Vegard calculates the positions of three bands of the latter which are within a few Angstrom units of the stronger auroral line λ7883, and points out that one of the three corresponds to an improbable transition, but leaves open the question as between the other two.
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References
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JEVONS, W. The Auroral Spectrum in the Infra-Red. Nature 129, 759–760 (1932). https://doi.org/10.1038/129759a0
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DOI: https://doi.org/10.1038/129759a0
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Infra-Red Bands in the Aurora
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