Temperature dependence of binary and ternary recombination of D 3+ ions with electrons

T. Kotrík, P. Dohnal, I. Korolov, R. Plašil, Š Roučka, J. Glosík, Chris H. Greene, V. Kokoouline

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Flowing and stationary afterglow experiments were performed to study the recombination of D3+ ions with electrons at temperatures from 77 to 300 K. A linear dependence of apparent (effective) binary recombination rate coefficients on the pressure of the helium buffer gas was observed. Binary (D3+ + e-) and ternary (D3 + + e- +He) recombination rate coefficients were derived. The obtained binary rate coefficient agrees with recent theoretical values for dissociative recombination of D3+. We describe the observed ternary process by a mechanism with two rate determining steps. In the first step, a rotationally excited long-lived neutral D3 is formed in D3+ - e- collisions. As the second step, the D3 collides with a helium atom that prevents autoionization of D 3. We calculate lifetimes of D3 formed from ortho-, para-, or metastates of D3+ and use the lifetimes to calculate ternary recombination rate coefficients.

Original languageEnglish
Article number034305
JournalJournal of Chemical Physics
Issue number3
Publication statusPublished - Jul 21 2010

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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    Kotrík, T., Dohnal, P., Korolov, I., Plašil, R., Roučka, Š., Glosík, J., Greene, C. H., & Kokoouline, V. (2010). Temperature dependence of binary and ternary recombination of D 3+ ions with electrons. Journal of Chemical Physics, 133(3), [034305]. https://doi.org/10.1063/1.3457940