Charge-transfer processes in collisions of H+ ions with H2, D2, CO, and CO2 molecules in the energy range 0.2-4.0 keV -: art. no. 062714

Charge-transfer processes resulting from collisions of H+ ions with H-2, D-2, CO, and CO2 molecules have been experimentally investigated in the energy range of 0.2-4.0 keV by using the initial growth-rate method. Theoretical analysis based on a molecular-orbital expansion method for H-2 and CO targets was also carried out. The observed cross sections are compared with previous experimental and theoretical data. The present results for H-2 are found to be in excellent accord with the recommended data by Barnett [Oak Ridge National Laboratory Report No. ORNL-6086 (1990)], and hence, confirm the accuracy of the recommended data. But, at 0.2 keV, the present data for D-2 are found to be smaller than those for H-2. For the CO molecule, the present data qualitatively agree well with most previous measurements, but show the stronger energy dependence, while the present theory shows a pronounced structure at around 0.25 keV and ties well with other low-energy measurements below 0.1 keV. For the CO2 molecule, the present results are in excellent accord with other measurements above 1 keV, while they show some differences below this energy where our experimental result displays the stronger energy dependence. These data are useful for various applications.