Abstract
SOME spectroscopic frequencies may be calculated more accurately than laboratory experiments can measure them. Ab initio molecular orbital calculations can be used to compute molecular properties, but none as accurately as Λ-doubling. This effect gives rise to splittings of molecular energy levels of diatomic molecules and transitions between the Λ-doublets are the sources of some of the most important radioastronomical spectral lines. Here we consider the as yet unobserved but very likely instellar species NH+.
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WILSON, I., RICHARDS, W. Radioastronomical frequency for interstellar NH+. Nature 271, 137 (1978). https://doi.org/10.1038/271137a0
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DOI: https://doi.org/10.1038/271137a0
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