Laboratory Measurement of the 6-CENTIMETER Formaldehyde Transitions
Abstract
The ho-lu rotational transition of 11212C16O in its ground and first two excited vibrational states, and that of 11213C160, H212C12O, and HD12Cl60 in their vibrational ground states, all of which lie at a wavelength of about 6 cm, have been studied with a beam-maser spectrometer. Line widths in the range 1-3 kllz have been attained, allowing the hyperfine structure of the transitions to be rather thoroughly resolved, and transition frequencies to be measured to an accuracy of the order of 100 Hz. All significant features of the observed spectra have been successfully interpreted in terms of the current theory of molecular hyperfine structure, and the appropriate hyperfine coupling have been determined.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- October 1971
- DOI:
- 10.1086/151155
- Bibcode:
- 1971ApJ...169..429T