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

Abstract

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 O2. 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 O2 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 O2, but are smaller in absolute magnitude.