One-electron capture and loss by fast multiply charged boron and carbon ions in H and H2

Abstract

Cross sections for one-electron capture by fast boron and carbon ranging from singly to fully ionised in both H and H2 have been measured within the energy range 100-2500 keV. At the higher velocities capture cross sections in H for the different initial charge states q>or=2 scale according to qn where n=2.4 and 2.5 for boron and carbon ions respectively. The present and previous capture cross sections for completely stripped ions are consistent with a q3 scaling rule at high velocities. Cross sections for one-electron loss by boron and carbon ions with charge states up to 2 and 3 respectively have also been determined. These considerably exceed the corresponding capture cross sections at the highest velocities considered.