Electron transfer processes in ion collisions with atomic hydrogen. Final report for period February 1, 1975--June 30, 1976

Results of experiments completed with Yale equipment coupled to the Oak Ridge Test Bench and Tandem Accelerator facilities are presented. Electron transfer cross sections have been measured at keV collision energies for B, C, N and O ions colliding with H, H2, Ar and He gas targets. The ion charge states studied range from +2 through +5. Also reported are cross sections for Si and Fe ions on H, H2 and Ar at energies between 1.5 and 14 MeV, with charge states varying between +5 and +13. Also measured were the cross sections for H+ collisions with H, H2 and Ar for energies between 0.8 and 2.5 MeV. At keV energies the cross sections for highly charged B, C, N and O ions are found to be 1 x 10-14 cm2. The cross sections for 4 MeV Fe ions scale roughly with the square of the ion charge, and have values as high as 0.5 x 10-14 cm2 for Fe10+ + H collisions. A strong energy dependence is found for Fe ion collisions between 4 and 14 MeV. Previous results for MeV H+ + Ar collisions are nicely reproduced, while our first results for the fundamental MeV H+ - H collision problem are cross sections higher than many theoretical predictions