Orientation effects for H+-Na(3p-1) collisions at energies beyond the 'velocity-matching' region

Cross sections for electron capture in collisions between H+ and laser-excited oriented Na(3(p-1)) atoms have been computed at intermediate energies (5-50 keV). A quantal method is used within the atomic orbital close-coupling approach as well as a purely classical model, i.e. the classical trajectory Monte Carlo method. Both methods are in good agreement over the entire energy range for total capture cross sections and partial n = 2 cross sections. At the level of state-to-state differential cross sections some differences between the two approaches become evident. The total probability for electron transfer in both methods turns our, however, always to be largest in left-hand side collisions where the projectile velocity can become parallel to (match) the electron velocity of the Na(3(p-1)) target.