On the effects of an internal barrier on fast four-atom ion-molecule reactions

M. L. Dubernet*, F. Rebentrost, K. L. Kompa, R. D. Levine

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

We investigate the influence of an internal barrier on an exothermic adiabatic reaction model between diatomic ions and molecules. Reaction cross-sections are calculated from quasi-classical trajectories for different initial vibrational and rotational states of the reactants and for relative collision energies in the range from 0.01 to 3 eV. It is shown that the height of a late internal barrier strongly influences both the characteristics of the state-selected cross-sections and the energy distributions of the products. In contrast to complex formation in the entrance region according to the Langevin model our analysis emphasizes the role of the full potential energy surface for an understanding of the dynamics of ion-molecule reactions.

Original languageEnglish
Pages (from-to)953-964
Number of pages12
JournalJournal of Chemical Physics
Volume105
Issue number3
DOIs
StatePublished - 15 Jul 1996

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