Charge transfer in cold collisions of rubidium atoms with calcium and ytterbium ions
We have theoretically investigated charge exchange processes occurring at low collisions of Rb atoms with Ca and Yb cations based on quantum-chemical accurate data for adiabatic potential energy curves and coupling matrix elements. The calculated cross sections exhibit all features of the Langevin ion-atom collision regime including a rich structure associated with centrifugal barrier tunneling (orbiting) resonances. We have shown that in contrast to Ca+ + Rb collisions the dominant process in Yb+ + Rb collisions is the radiative charge transfer.