SINGLE-ELECTRON CAPTURE BY 100-1500-KEV C+ IONS IN SEVERAL ATOMIC AND MOLECULAR TARGETS

Experimentally determined single-electron-capture cross sections are presented for 100-1500-keV C+ impact on He, Ne, Ar, H-2, N2, O2, CO, NH3, CH4, C2H6, and (CH3)2 NH gaseous targets. For the atomic targets, the single-capture cross sections were found to merge as the impact energy increased. For the molecular targets, the relative changes in the cross sections exhibit little or no dependence on the impact energy. For these systems and in the energy range considered here, the single-electron-capture cross sections were found to scale remarkably well with the "size" of the molecular target, namely with the square of the bond length for the diatomic targets and with the number of atoms comprising the polyatomic targets.