Absolute cross sections and kinetic energy release for doubly and triply charged fragments produced by electron impact on CO+

J. Lecointre, D. S. Belic, J. J. Jureta, K. Becker, H. Deutsch, J. Limtrakul, T. D. Märk, M. Probst, P. Defrance

Research output: Contribution to journalArticle

Abstract

Absolute cross sections for electron impact ionization of CO+ leading to the formation of doubly and triply charged products (CO2+, C2+ and O2+, C3+ and O3+) are reported in the energy range from their respective thresholds to 2500 eV. Around the maximum, cross section values are found to be (13.36 0.56) × 10 -18 cm2, (5.58 0.55) × 10-18 cm 2 and (1.37 0.14) × 10-18 cm2 for CO 2+, C2+ and O2+, respectively, and (28.3 7.0) × 10-21 cm2 and (2.4 0.7) × 10-21 cm2 for C3+ and O3+, respectively. The analysis of ionic product velocity distributions, obtained by means of a crossed electron-ion beam set-up, allows the determination of the kinetic energy release distributions. They are seen to extend from 0 to 50 eV both for C2+ and O2+. The mean kinetic energy releases for C3+ and O3+ are found to be 33 5 eV and 39 9 eV, respectively. The cross sections are seen to depend exponentially on the potential energy of each dissociated ion pair. The total single CO+ ionization cross section calculated by application of the Deutsch-Märk (DM) formalism is found to be in good agreement with the experimental results.

Original languageEnglish (US)
Article number008
Pages (from-to)85-100
Number of pages16
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Volume40
Issue number1
DOIs
StatePublished - Jan 14 2007

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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