Orientation of the (3p)P-2 state resulting from electron capture in Al3+/H collisions

The orientation of the excited (2p(6)3p)P-2 state of Al2+, created by electron capture in collisions of Al3+ ions with atomic H and D, is investigated theoretically. The collision dynamics are described using an adiabatic representation of the collision complex and calculations are carried out in the 0.5 to 10 keV energy range. Total and differential cross sections for electron capture are presented. The range of scattering angles for which there is a strong propensity for orientation of the P-2 state is determined. The influence of the short range adiabatic potentials on the orientation at small scattering angles is discussed.