Abstract
THE detection in galactic emission nebulae of several of the hydrogen lines corresponding to transitions between levels with large principal quantum numbers has already been reported1–4. The lines were in the frequency range 8,873–1,424 Mc/s, corresponding to transitions in the range 90α–166α, using the notation suggested by Palmer and Zuckerman4 in which nα indicates a transition from level of quantum number (n+1) to n. A transition from (n+2) to n is indicated by nβ (see Fig. 1a).
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GARDNER, F., MCGEE, R. Detection of β-Transitions in the Recombination Spectrum of Hydrogen near 9 cm Wavelength. Nature 213, 480–481 (1967). https://doi.org/10.1038/213480a0
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DOI: https://doi.org/10.1038/213480a0
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