Sensitivity of a Titan ionospheric model to the ion-molecule reaction parameters

N. Carrasco, C. Alcaraz, O. Dutuit, S. Plessis, R. Thissen, V. Vuitton, R. Yelle, P. Pernot

Research output: Contribution to journalArticlepeer-review

58 Scopus citations


Various aspects of ion-molecule reactions for Titan ionospheric chemistry modeling are reviewed in this work: temperature/collision energy effects on reaction rates and, more importantly, on products distributions; differential reactivity of isomers of ions; reactivity of excited states of ions; pathways to the building of complex ions. We evaluate here the extent to which these points affect model predictions. We find that the present limiting factors to model predictivity are the model incompleteness for heavy ion production pathways; the differential reactivity of isomers; and, to a lesser degree, the temperature effects on the branching ratios of ion-molecule reactions. Extensive experimental studies are required to fill these gaps in ion-molecule reactivity knowledge.

Original languageEnglish (US)
Pages (from-to)1644-1657
Number of pages14
JournalPlanetary and Space Science
Issue number12
StatePublished - Nov 2008


  • Branching ratio
  • Ion-molecule reaction
  • Ionospheric chemistry model
  • Sensitivity analysis
  • Titan
  • Uncertainty propagation

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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