On the role of projectile electrons for target recoil charge state production in intermediate-energy B$^{2+}$-Ne collisions*

We consider $q$-fold target charge state production in 10--600~keV/u B$^{2+}$-~Ne collisions within an independent electron model. The model treats projectile and target electrons on the same footing using the same effective potential forall of them and makes use of a single-determinant wave function for the combined system [1]. Results are compared with recent experimental and theoretical data [2]. We find that the total cross sections for positive ion production as well as Ne$^{q+}$ production ($q=1,\ldots,4$) determined in coincidence with unchanged Be$^{2+}$ projectiles agree well with experiment in the 30-400~keV/u energy range. At energies below 200~keV/u the projectile electrons are shown to play a crucial role in order to reproduce the experimental data. \\[4pt] [1]~T.~Kirchner and M.~Horbatsch, Phys.~Rev.~A~\textbf{63}, 062718 (2001);\\[0pt] [2]~W.~Wolff et al, Phys.~Rev.~A~\textbf{84}, 042704 (2011).