Abstract
The formation of CO2-Ar and CO2-He collision complexes also called quasi-complexes (QC) or Feshbach-type resonances, is studied using the method of classical trajectories. Exact classical equations in body- fixed coordinates, ab initio interaction potentials and Monte-Carlo sampling of collision parameters are used in these computations. Statistical analysis is made for the parameters of QC formed in collisions. It is shown that QC can be both short-lived and very long-lived and are characterized by a variety of interparticle separations. Among the total number of collisions the fraction of QC increases rapidly with temperature decrease. The contribution of QC to CO2 rotational inelastic cross sections evaluated at two temperatures (100 K and 240 K) was found to be small. At the same time, rotational relaxation via QC-forming collisions turned out to be much more efficient than via conventional inelastic collisions.
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© 2003 Springer Science+Business Media Dordrecht
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Ivanov, S.V. (2003). Trajectory Study of CO2-Ar and CO2-He Collision Complexes. In: Camy-Peyret, C., Vigasin, A.A. (eds) Weakly Interacting Molecular Pairs: Unconventional Absorbers of Radiation in the Atmosphere. NATO Science Series, vol 27. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0025-3_3
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DOI: https://doi.org/10.1007/978-94-010-0025-3_3
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-4020-1596-0
Online ISBN: 978-94-010-0025-3
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