Abstract
Using a normalized perturbative, semi-classical approach, collision-induced rotational excitation rates of CO, OCS, SiO, HCN, HC3N due to H2 are computed. The calculated excitation rates for CO−H2 and OCS−H2 systems at 100 K are in good agreement with the results of close coupling approximation at low values ofJ, whereJ is the rotational quantum number. The rates are found to be very sensitive with respect to ortho and para states of H2.
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Mehrotra, S.C. Collisional excitation of interstellar molecules due to H2: Linear molecules CO, OCS, SiO, HCN and HC3N in1Σstate. Astrophys Space Sci 71, 507–514 (1980). https://doi.org/10.1007/BF00639406
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DOI: https://doi.org/10.1007/BF00639406