It is shown that the revised photochemical theory for O++ in the earth's ionopshere, where double photoionization of O is the dominant source, is consistent with recent O++ measurements on Venus. A rate coefficient of 1.5 × 10−10 cm³ s−1 for O++ + O is obtained, and the possible importance of O++ chemistry on minor atomic ions and airglow emissions is explored.
Fox, J. L.,
& Victor, G. A.
(1981). O++ in the Venusian Ionosphere. Journal of Geophysical Research: Space Physics, 86 (A4), 2438-2442.