Double ionization of atomic oxygen by electron impact |
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Authors: | D.L. Ziegler J.H. Newman K.A. Smith R.F. Stebbings |
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Affiliation: | Space Physics and Astronomy Department, Rice University, Houston, TX 77001, U.S.A. |
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Abstract: | Laboratory measurements of the cross-sections for double ionization of atomic oxygen by electrons are presented for energies from threshold to ~ 400 eV. A maximum cross-section of about 5.6 × 10?18 cm2 is observed at an electron energy of approx. 200 eV. Absolute cross-sections are obtained from measurements of the ratio of the cross-sections for double and single ionization, coupled with absolute cross-sections for single ionization previously measured by other investigators. The possible effects of excited oxygen reactants are examined, and the reported cross-sections are considered to be characteristic of ground state oxygen atoms. |
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