Rotationally Inelastic Collisions of c2 with ORTHO-H2 and PARA-H2

Details Rotationally Inelastic Collisions of c2 with ORTHO-H2 and PARA-H2 Rotationally Inelastic Collisions of c2 with ORTHO-H2 and PARA-H2

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994mnras.271..827p&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Vol. 271, NO. 4/DEC15, P. 827, 1994

Astronomy and Astrophysics

Astronomy

6

Scientific paper

Close-coupled and coupled states cross-sections for rotational transitions in C2 on collision with ortho- and pa ra-H2 have been calculated using a potential energy surface based on the ab initio calculations of Lavendy et al. The coupled states approximation is found to be qualitatively accurate. The H2 molecule is well represented by its rotational ground state (j =0 or j = 1) at collision energies below its rotational excitation threshold. Rate coefficients for excitation of C2 by collision with H2 are derived from the calculated collision cross-sections, and are found to be higher than earlier estimates. Key words: molecular processes - ISM: molecules.

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