Eur. Phys. J. D (2016) 70: 88
https://doi.org/10.1140/epjd/e2016-60582-2

Regular Article

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

¹ Department of Physics, Florida A&M University, Tallahassee, FL 32307, USA
² Quantum Theory Project, Departments of Physics and Chemistry University of Florida, Gainesville, FL 32611-8435, USA
³ Institute for Physics, Chemistry and Pharmacy University of Southern Denmark, Odensa, Denmark

^a e-mail: bidhan.saha@famu.edu

Received: 14 October 2015
Published online: 19 April 2016

Abstract

Charge exchange in collisions of C⁶⁺ ions with H and H₂ 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 C⁶⁺ 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 H₂, 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 C⁶⁺ with H. In low energy region, it is observed that H₂ has larger isotope effects than H atom due to the polarizability effect which is larger than the mass effect.