Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979natur.278..624c&link_type=abstract
Nature, vol. 278, Apr. 12, 1979, p. 624, 625. NATO-supported research.
Astronomy and Astrophysics
Astronomy
4
Hydroxyl Emission, Interstellar Masers, Radio Astronomy, Radio Frequencies, Vibrational Spectra, Interstellar Chemistry, Molecular Orbitals, Molecular Rotation, Morse Potential, Rotational Spectra, Splitting, Wave Functions
Scientific paper
Theoretical calculations of Lambda-doublet splittings are compared with experimental determinations of the rotational spectra of interstellar hydroxyl masers. Separate wave functions for X 2 Pi and A 2 Sigma + are calculated using an atomic orbital basis set. Electronic functions were improved by configuration interaction with 15 Pi and 11 Sigma configurations. Morse functions are used for vibrational wave functions, with vibrational summations extending to v' equals 5. The agreement between theoretical and experimental values for the lowest rotational level is found to be accurate to 1 MHz, and to values for other rotational levels which indicate that the limits to the accuracy of the calculations are a few megahertz.
Cooper David L.
Richards W. G.
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