Charge transfer in slow collisions of Ne2+ with H

Potential energy curves and radial couplings have been calculated for electron capture from H by the ground and metastable excited states of Ne2+. The electron transfer can be accompanied by excitation of a core electron of Ne2+. Cross sections and rate coefficients have been estimated at collision energies of a few eV. The fastest rate coefficient for electron capture, 6 x 10-11 cm3s-1, is that from the 1D entrance channel. This rate is much too low to explain values inferred from observations of planetary nebulae. (author)