One-electron capture by slow Al2+ ions in atomic and molecular hydrogen

Abstract

Cross sections for one-electron capture by Al2+ ions in both atomic and molecular hydrogen have been measured and calculated at energies within the range 10-2000 eV amu-1. Measurements are based on the use of a tungsten tube furnace to provide a target of highly dissociated hydrogen. Translational energy spectroscopy used with a specially developed recoil source of metallic ions is used to show that ground state Al+ ion production is predominant. The calculations, which are based on a model potential description of the orbitals, predict cross sections which are somewhat larger than the measured values.