Rotational inelastic cross sections for OCS-Ar, OCS-He, OCS-H2 collisions - A comparison between theory and experiment. [applicable to interstellar processes]

Pressure broadening parameters resulting from collisional perturbations by Ar, He, and H2 for a number of rotational transitions in the ν3 band of OCS have been measured using a diode laser spectrometer. The data are compared with theoretical values obtained using intermolecular potentials previously suggested for these systems and infinite order sudden approximation molecular scattering calculations.

[1]  W. Liu,et al.  Theory of the relaxation matrix and its relation to microwave transient phenomena. II. Semiclassical calculations for systems of OCS and nonpolar collision partners , 1975 .

[2]  R. Gordon.  Theory of the Width and Shift of Molecular Spectral Lines in Gases , 1966 .

[3]  S. Green.  Rotational excitation in collisions between two rigid rotors - Alternate angular momentum coupling and pressure broadening of HCl by H2 , 1977 .

[4]  A. Picard-Bersellini,et al.  Pressure broadening of CO infrared lines perturbed by H2 and He , 1983 .

[5]  S. Green.  Vibrational dependence of pressure induced spectral linewidths and line shifts - Application of the infinite order sudden scattering approximation , 1979 .

[6]  S. Green.  Calculation of pressure-broadened linewidths for CO in Ar , 1985 .

[7]  J. Davies,et al.  A New Tabulation of the Voigt Profile. , 1963 .

[8]  S. Green.  On the amount of information in rotational relaxation experiments with application to microwave transient T1 and T2 rates , 1978 .

[9]  Sally Chapman,et al.  Rotational excitation of linear molecules by collisions with atoms: Comparison of classical and quantum methods , 1977 .

[10]  A. Picard-Bersellini,et al.  Overlapping effects and collisional narrowing in rotational doublets of OCS in the infrared , 1984 .

[11]  S. Chapman,et al.  Collisional excitation of interstellar molecules - Linear molecules CO, CS, OCS, and HC3N , 1978 .

[12]  Sheldon Green,et al.  ON THE USE OF PRESSURE BROADENING DATA TO ASSESS THE ACCURACY OF CO-He INTERACTION POTENTIALS - eScholarship , 1980 .

[13]  D. Kouri,et al.  On the factorization and fitting of molecular scattering information , 1977 .