State-selective single electron capture by multiply charged ions

Single electron capture by triply charged rare gas ions colliding with various rare gas atoms has been studied by means of translational energy spectroscopy (TES) at low collision energies. The final state population is discussed in terms of the so-called reaction window predicted by various models as well as by extended multichannel Landau Zener calculations (MCLZ). The analysis shows the limitations of such model descriptions and yields information on the coupling strength in the case of inner shell capture or multi-electron processes.