Experimental absolute electron impact ionization cross-sections of Cl 2

R. Basner, K. Becker

Research output: Contribution to journalArticlepeer-review


We measured absolute partial cross-sections for the formation of Cl 2+, Cl22+, Cl+ and Cl2+ ions following electron impact on molecular chlorine (Cl 2) from threshold to 900 eV using a time-of-flight mass spectrometer. The ion spectrum at all impact energies is dominated by the singly charged ions with maximum cross-section values of 4.6 × 10-16 cm 2 for Cl2+ at 32 eV and 4.0 × 10 -16 cm2 for Cl+ at 70 eV. The cross-sections for the formation of the doubly charged ions are more than one order of magnitude lower. Double ionization processes account for about 6% of the total ion yield at 70 eV. The absolute total ionization cross-section of Cl 2 was obtained as the sum of all measured partial ionization cross-sections. To the extent possible, a comparison of our results with other available measured and calculated data is made.

Original languageEnglish (US)
Pages (from-to)1-10
Number of pages10
JournalNew Journal of Physics
StatePublished - Sep 17 2004

ASJC Scopus subject areas

  • General Physics and Astronomy


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