Electron-impact rotational excitation of the carbon monosulphide (CS) molecule

Details Electron-impact rotational excitation of the carbon monosulphide (CS) molecule Electron-impact rotational excitation of the carbon monosulphide (CS) molecule

Apr 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010mnras.403.1409v&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 403, Issue 3, pp. 1409-1412.

Astronomy and Astrophysics

Astronomy

3

Molecular Data, Molecular Processes, Scattering

Scientific paper

Rotational excitation of the carbon monosulphide (CS) molecule by thermal electron-impact is studied using the molecular -matrix method combined with the adiabatic-nuclei-rotation (ANR) approximation. Rate coefficients are obtained for electron temperatures in the range 5-5000 K and for transitions involving levels up to J = 40. It is confirmed that dipole allowed transitions (ΔJ = 1) are dominant and that the corresponding rate coefficients exceed those for excitation by neutrals by at least five orders of magnitude. As a result, the present rates should be included in any detailed population model of CS in sources where the electron fraction is larger than ~10-5, in particular in diffuse molecular clouds and interstellar shocks.

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