State-selective single and double electron capture in the collision of N4+with He - art. no. 042721

Ab initio potential-energy curves and rotational and radial coupling matrix elements of the (2)Sigma (+) and (2)Pi molecular states involved in the co llision of N4+ with He are determined by means of configuration interaction methods. In the 1-50-keV laboratory energy range, the total and the partia l electron capture cross sections have been obtained using a semiclassical approach. Comparison with experiment shows the importance of the double cap ture channels.