Electron-Impact Total Ionization Cross Sections of Molecular Ions

Journal Article · Wed Mar 01 00:00:00 EST 2000 · Journal of Research of the National Institute of Standards and Technology

DOI:https://doi.org/10.6028/jres.105.032· OSTI ID:1628742

Kim, Yong-Ki ^[1]; Irikura, Karl K. ^[1]; Ali, M. A. ^[2]

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1. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
2. Howard Univ., Washington, DC (United States)

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 H$$^+_2$$, N$$^+_2$$, CD⁺, and CO⁺ from the modified BEB formula are compared to available experimental data. The theory is in good agreement with experimental data on H$$^+_2$$, N$$^+_2$$, and CD⁺, but the experimental data by Belic et al. on N$$^+_2$$, 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.

• Research Organization: National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Fusion Energy Sciences (FES)
• OSTI ID: 1628742
• Journal Information: Journal of Research of the National Institute of Standards and Technology, Vol. 105, Issue 2; ISSN 1044-677X
• Publisher: National Institute of Standards (NIST)
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
47 OTHER INSTRUMENTATION
instruments & instrumentation
physics
electron-impact ionization
molecular ion
total ionization cross sections