Electron capture and excitation precesses in the Li(2s; 2pσ, 2pπ)+H+ collision (0.1-10 keV)

Li(n = 2) to H*(n = 2, 3) and Li*(2p, n = 3) charge transfer and excitation processes are studied in the medium-energy range 0.1-10 keV. The static model includes a basis of 26 molecular states. The lithium atom is described using a model potential and the semiclassical impact parameter method with straight trajectories is used for the dynamical simulation. A common translation factor is included to account correctly for the electron translation movement. For this collision system, we calculate the total cross sections and probabilities for the different capture and excitation processes. The calculation reflects a Ly alpha radiation enhancement for the capture to H*(2p) from Li*(2p). A strong alignment effect in the capture processes to H*(2) is also shown and evaluated through the alignment parameter A(n = 2, 3). Finally, we provide a mechanism through the non-adiabatic radial and rotational couplings, showing the importance of the H*(3) and Li*(3) states in this collision.