Charge transfer of O(3+) ions in collisions with atomic hydrogen

Physics – General Physics

Scientific paper

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Charge Transfer, Gas-Ion Interactions, Hydrogen Atoms, Ionic Collisions, Oxygen Ions, Ion Exchanging, Ionization Cross Sections, Space Plasmas

Scientific paper

Cross sections are calculated for the charge transfer of O(3+) ions in collisions with hydrogen atoms. The cross sections are in satisfactory agreement with ion-trap measurements at energies near 2.5 eV and with ion-beam measurements between 40 eV and 5 keV. The calculated cross sections uniformly exceed the ion-beam values by about 25 percent. The discrepancy, if real, may be attributed to the presence of less reactive metastable ions in the beam. The theory demonstrates that the charge-transfer process results in the emission of visible and ultraviolet photons of specific wavelengths whose detection would serve as a diagnostic probe of the detailed mechanism by which charge transfer proceeds.

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