Charge Transfer between Some Atmospheric Ions and Atomic Oxygen

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Abstract
Cross sections for charge transfer between oxygen atoms and N+, N2+, NO+, and O2+ ions have been measured within the energy range 50 to 10 000 eV, using modulated‐crossed‐beam techniques. The neutral beam effused from a Pyrex tube in which an electrodeless rf discharge could be established. It was determined, by use of a mass spectrometer, that about 40% of the molecules in the beam could be dissociated. The currents of slow ions which resulted from charge transfer between the primary ion beam and both the undissociated and partially dissociated oxygen beams were measured. The atomic cross sections were then evaluated from knowledge of these currents, the dissociation, and the previously determined molecular charge‐transfer cross sections.

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