Multiple ionization of neon atoms in collisions with bare and dressed ions: A mean-field description considering target response

Abstract

We investigate projectile-charge-state-differential electron removal from neon atoms by impact of ${\mathrm{He}}^{2+}$, ${\mathrm{Li}}^{3+}$, ${\mathrm{B}}^{2+}$, and ${\mathrm{C}}^{3+}$ ions at intermediate projectile energies $(25\phantom{\rule{0.16em}{0ex}}\text{keV}/\text{u}$ to $1\phantom{\rule{0.16em}{0ex}}\text{MeV}/\text{u})$. The many-electron problem is described with an independent electron model in which active electrons at both collision centers are propagated in a common mean-field potential. Response to electron removal is taken into account in terms of a time-dependent screening potential, and a Slater-determinant-based method is used for the final-state analysis. Total cross sections for net recoil ion production, multiple ionization, and capture channels are mostly in good agreement with published experimental data. Results from equicharged bare and dressed ions are compared and the net recoil ion production cross section is broken down into contributions associated with different final projectile charge states in order to shed light on the role of the projectile electrons.