Electron capture, loss and excitation in collisions of H⁺, H(1s), H(2s) and H⁻in atomic oxygen

Electron capture, electron loss and excitation cross sections have been determined for 2.5-25 keV H(1s) and H(2s) atoms and H + and H - ions in both O and O 2 . An iridium tube furnace has been used to provide a target of highly dissociated oxygen. The cross section for the total destruction of H(2s) atoms in O and O 2 has also been determined. In general, the cross sections in atomic oxygen exhibit an energy dependence similar to that of the corresponding cross sections in O 2 , but are smaller in absolute magnitude.