Abstract
THE analysis of the band spectrum of helium is now nearly complete. The great majority of the stronger lines have been allocated to bands, of which some sixty have now been recognised. The remaining lines may be attributed to (1) higher members of the electronic sequences already known, (2) electronic levels of a new type, and (3) vibrational levels.
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CURTIS, W., HARVEY, A. Properties of the He2 Rotation Terms. Nature 124, 12 (1929). https://doi.org/10.1038/124012a0
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DOI: https://doi.org/10.1038/124012a0
