Trajectory study of CO2-Ar and CO2-He collision complexes. In: Weakly Interacting Molecular Pairs: Unconventional Absorbers of Radiation in the Atmosphere

Автор: Ivanov S.V.
Сборник: Science Series IV: Earth and Environmental Sciences
Том: 27
Тезисы
Год издания: 2003
Издательство: Kluwer Academic Publishers [etc]
Местоположение издательства: Dordrecht ; Boston [etc.], Netherlands
Первая страница: 49
Последняя страница: 63
DOI: 10.1007/978-94-010-0025-3
Аннотация: 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 (100K and 240K) 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
Добавил в систему: Иванов Сергей Викторович

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