Microwave spectra of molecules of astrophysical interest. XX. Methane
- 1 October 1981
- journal article
- conference paper
- Published by AIP Publishing in Journal of Physical and Chemical Reference Data
- Vol. 10 (4) , 1085-1095
- https://doi.org/10.1063/1.555652
Abstract
The available data on methane are critically reviewed for information applicable to radio astronomy. Molecular data such as rotational constants, centrifugal distortion constants, and the distortion electric dipole moment are presented for 12CH4 and 13CH4. Observed microwave, infrared‐microwave double resonance, and molecular beam measurements of (ΔJ = 0) frequencies are tabulated along with experimental uncertainties which represent estimated 95% confidence limits. For 12CH4, these data have been analyzed to predict all Q‐branch rotational transitions for J?20; the predictions are presented with 95% confidence limits which have been calculated from the analysis.Keywords
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