Charge exchange collisions of slow C 6+ with atomic and molecular H

Charge exchange in collisions of C 6+ ions with H and H 2 is investigated theoretically at projectile energies 0.1 < E < 10 keV/amu, using electron nuclear dynamics (END) − a semi-classical approximation which not only includes electron translation factors for avoiding spurious couplings but also employs full dynamical trajectories to treat nuclear motions. Both the total and partial cross sections are reported for the collision of C 6+ ions with atomic and molecular hydrogen. A comparison with other theoretical and experimental results shows, in general good agreement except at very low energy, considered here. For H 2 , the one- and two-electron charge exchange cross sections are calculated and compared with other theoretical and experimental results. Small but non-negligible isotope effects are found at the lowest energy studied in the charge transfer of C 6+ with H. In low energy region, it is observed that H 2 has larger isotope effects than H atom due to the polarizability effect which is larger than the mass effect. Graphical abstract