Absolute Merged Beams Charge Exchange Cross Sections for H- like and Fully Striped Ions on Atomic Hydrogen

Absolute total cross sections for single electron capture by hydrogen-like ions of carbon, nitrogen, oxygen and fully-stripped oxygen ions from atomic hydrogen are being measured in the relative collision energy range of 0.01-20 keV/amu. Measurements are performed using a merged-beams technique with intensive highly charged ion beams extracted from an all-permanent-magnet ECR ion source on a 250 kV platform. At the higher energies the measurements are in good agreement with previous H-oven measurements (Meyer et al. PRA 32, 3310(1985)) but unexpectedly decrease toward lower energies. The experimental results will be discussed and compared with different theoretical calculations.