Publication Abstracts

Tucker 1972

Tucker, K.D., 1972: Hyperfine Structure in the Microwave Spectrum of Formaldehyde and Its Isotopic Species. Ph.D. thesis. Columbia University.

The 110-111 rotational transitions of H2CO, H213CO, H2C18O, HDCO, and D2CO, all of which lie at a wavelength of about 6 cm, and 211-212 transitions of H2CO, H213CO, and H2C18O at 2 centimeters have been studied with a beam-maser spectrometer. Line widths in the range 1.3-2.5 kHz have been attained, allowing the hyperfine structure of the transitions to be measure to an accuracy of a few parts in 108 or better. All significant features of the observed spectra have been successfully interpreted in terms of the theory of molecular hyperfine structure, and the appropriate hyperfine coupling constants have been determined. The principal axis system of the electric field gradient tensor at the position of the hydrogen nucleus has been found to coincide with the molecular bond axis system to within better than one degree. The diagonal elements of the spin-rotation tensors of the three most common isotopic species have been determined, allowing the hyperfine structure of any formaldehyde rotational transition of foreseeable astronomical interest to be calculated in the rigid-rotor approximation.

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BibTeX Citation

@phdthesis{tu05200y,
  author={Tucker, K. D.},
  title={Hyperfine Structure in the Microwave Spectrum of Formaldehyde and Its Isotopic Species},
  year={1972},
  school={Columbia University},
  address={New York, N.Y.},
}

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RIS Citation

TY  - THES
ID  - tu05200y
AU  - Tucker, K. D.
PY  - 1972
BT  - Hyperfine Structure in the Microwave Spectrum of Formaldehyde and Its Isotopic Species
PB  - Columbia University
CY  - New York, N.Y.
ER  -

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