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Long-Range Interaction Potential of Open Shell Atoms with Neutral Molecules : Application to the Calculation of the Rate Constant for the C2H(2Σ+)+O(3P) Reaction

Published online by Cambridge University Press:  21 December 2011

Yuri Georgievskii  and
Stephen J. Klippenstein
Yuri Georgievskii
Affiliation:
Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, IL 60439
Stephen J. Klippenstein
Affiliation:
Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, IL 60439
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Abstract

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An accurate knowledge of the long-range interaction potential for the ground and first few excited electronic states is needed for quantitative prediction of the rate coefficients for astrochemical reactions at low temperatures. Some reactions important for astrochemical modeling include an open-shell atom as one of the fragments. Due to the interplay between the spin-orbit and quadrupole interactions such reactions require a special treatment. In this paper we derive the general expressions for the energy levels for such systems, apply them to the C2H(2Σ+)+O(3P) reaction, and compare the results with ab initio calculations.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S280: The Molecular Universe , June 2011 , pp. 372 - 382
Copyright
Copyright © International Astronomical Union 2011

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