title: Electron-Impact Total Ionization Cross Sections of Molecular Ions.
abstract: The Binary-Encounter-Bethe (BEB) model for electron-impact total ionization cross sections of neutral molecules has been modified for molecular positive ions. The total ionization cross sections for [Formula: see text], [Formula: see text], CD(+), and CO(+) from the modified BEB formula are compared to available experimental data. The theory is in good agreement with experimental data on [Formula: see text], [Formula: see text], and CD(+), but the experimental data by Belic et al. on [Formula: see text], and CO(+) are lower than the theory. The large difference between the theory and experiment on CO(+) is a strong indication of the dominance of the dissociative ionization channel, CO(+)→C(+)+O(+), which was not included in the experiment.
authors.affiliation: National Institute of Standards and Technology, Gaithersburg, MD 20899-0001.
authors.forename: Y K
authors.initials: YK
authors.lastname: Kim
authors.affiliation: National Institute of Standards and Technology, Gaithersburg, MD 20899-0001.
authors.forename: K K
authors.initials: KK
authors.lastname: Irikura
authors.affiliation: Department of Chemistry, Howard University, Washington, DC 20059.
authors.forename: M A
authors.initials: MA
authors.lastname: Ali
keywords: electron-impact ionization; molecular ion; total ionization cross sections