Abstract
We report the calculated cross sections for the removal of ions in collisions with hydrogen atoms for the collision energy range between 0.01 meV and 100 eV. Radiative association is the dominant mechanism at the low-energy extreme and for collision energies above 10 meV radiative charge transfer is dominant. Above 8 eV the radiative processes are negligible, and direct charge transfer is the primary removal mechanism. Using a quantum-mechanical method, we obtain the spectrum of the emitted radiation for the radiative charge transfer process at several collision energies. The emission spectrum has a main peak at wavelengths near 113 nm, which corresponds to the energy difference between the A and states of the molecular ion at large internuclear distances. At higher collision energies, significant contributions to the emission spectra occur at shorter wavelengths, and distinct peaks appear. We interpret these peaks as a result of orbiting in the outgoing channel.
- Received 17 November 1988
DOI:https://doi.org/10.1103/PhysRevA.40.2340
©1989 American Physical Society