VIBRATION-ROTATIONAL INTENSITIES FOR DIATOMIC MOLECULES OF ASTROPHYSICAL INTEREST: THE ISOVALENT MOLECULES CO, CS, SiO AND SiS
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Date
1987
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Publisher
Ohio State University
Abstract
Vibration-rotational dipole moment matrix elements and Einstein A coefficients have been calculated for a group of isovalent molecules of astrophysical interest. The wavefunctions used were obtained by a direct numerical integration of the radial Schrodinger equation with an RKR potential-energy function. The dipole-moment functions were represented by Pade approximants which have the correct theoretical long-range dependence on the internuclear separation. The coefficients in these expressions were obtained for CO, CS and SiO from experimental intensity data and/or ab initio calculations. For SiS for which only the permanent dipole moment is known, we estimated the intensities from the systematic trends found for the other three isovalent molecules.
Description
Author Institution: Department of Physics and Astronomy, University of Alabama; Department of Physics and Astronomy, NASA Ames Research Center