The Lyman and Werner Band Systems of Molecular Hydrogen

Line positions and emission probabilities of the Lyman and Werner band systems of molecular hydrogen have been calculated by solving a system of four coupled Schrödinger equations. We have been able to identify several thousand new lines emitted by a low pressure discharge in H2 from 172 nm down to...

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Bibliographic Details
Published in:Journal of molecular spectroscopy 1993-02, Vol.157 (2), p.512-523
Main Authors: Abgrall, H., Roueff, E., Launay, F., Roncin, J.Y., Subtil, J.L.
Format: Article
Language:English
Subjects:
Atomic and molecular physics
Exact sciences and technology
Molecular properties and interactions with photons
Physics
Properties of molecules and molecular ions
Rotation, vibration and vibration-rotation constants
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Summary:Line positions and emission probabilities of the Lyman and Werner band systems of molecular hydrogen have been calculated by solving a system of four coupled Schrödinger equations. We have been able to identify several thousand new lines emitted by a low pressure discharge in H2 from 172 nm down to 78 nm. Many high-J energy levels are reported for the first time. Molecular constants are derived for the (unperturbed) 1Π−u states. Several examples demonstrate that the emission spectrum is very significantly different from that which could be deduced from a knowledge of only the absorption spectrum.
ISSN:0022-2852
1096-083X
DOI:10.1006/jmsp.1993.1040