Charge-transfer collisions of multicharged ions with atomic and molecular hydrogen: measurements with low-energy accelerators

Electron-capture cross sections for O/sup +q/ + H → O/sup +q-1/ + H+ and O/sup +q/ + H2 → O/sup +q-1/ + H2+ are shown for projectile energies from 10 to 1300 keV. At low energies the cross sections are determined by details of the quasi-molecule potential; at higher energies momentum transfer becomes the dominant mechanism, and the cross sections fall off similarly. Results with other projectiles are described briefly. 1 figure