Abstract
DURING the last ten years, few branches of physical inquiry have called forth a greater output of published work than that of molecular spectra. Many reasons may doubtless be adduced to account for this. On the theoretical side, it is generally recognised that the anharmonic vibrating-rotating molecule with its complex magnetic coup lings, and the interaction of these energy types with each other and with the electronic energy, provides one of the most fascinating applications of the quantum theory. On the experimental side, aesthetic considerations (and the interest of unravelling and ordering what is often a very complex system of spectral lines) must be given no little weight. Whatever may be the impressions given by a reading of the theory, the experimentalist is well aware that scarcely any band system is really typical or without peculiarities of particular significance for the structure of the emitting molecule.
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JOHNSON, R. Band Spectra of Diatomic Molecules*. Nature 131, 102 (1933). https://doi.org/10.1038/131102a0
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DOI: https://doi.org/10.1038/131102a0