The microwave and far-infrared spectra of the O-(18)H radical

Details The microwave and far-infrared spectra of the O-(18)H radical The microwave and far-infrared spectra of the O-(18)H radical

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...305..513c&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004- 637X), vol. 305, June 1, 1986, p. 513-517., SERC- supported research.

Astronomy and Astrophysics

Astrophysics

9

Hydroxyl Emission, Infrared Spectra, Interstellar Matter, Line Spectra, Microwave Spectra, Molecular Spectra, Electric Dipoles, Energy Levels, Far Infrared Radiation, Quantum Numbers

Scientific paper

Far-infrared laser magnetic resonance (LMR) spectroscopy was used to calculate the frequencies, wavelengths, and line strengths for transitions of O-(18)H molecules at microwave and far-infrared frequencies. In this experiment, a molecular transition frequency is tuned into coincidence with that of a fixed frequency laser by the application of a variable magnetic field. The O-(18)H radicals, detected in natural abundance (0.20 percent), were produced by the reaction of hydrogen atoms with nitrogen dioxide. These data together with microwave frequencies ascertained by Gottlieb, Redford, and Smith (1974) were used to determine the parameters of an effective Hamiltonian. Rotational levels up to J = 5.5 were involved. Results are indicated schematically and the low-lying energy levels of O- (18)H are shown. It is concluded that the frequencies of transitions between levels studied directly in the LMR experiment are reliable.

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