Inelastic processes in Na${}^{+}-$Ne, Ar and Ne${}^{+},$ Ar${}^{+}-$Na collisions in energy range $0.5-14$ keV

Abstract

Absolute cross sections for charge-exchange, ionization and excitation in NaNe and Na${}^{+}-$Ar collisions were measured in the ion energy range keV using a refined version of a capacitor method, and collision and optical spectroscopy methods simultaneously in the same experimental set-up. Ionization cross sections for Ne${}^{+}-$Na and Ar${}^{+}-$Na collisions are measured at the energies of $2-14$ keV using a crossed-beam spectroscopy method. The experimental data and the schematic correlation diagrams are used to analyze and determine the mechanisms for these processes. For the charge-exchange process in Na${}^{+}$ $-$Ar collisions two nonadiabatic regions are revealed and mechanisms responsible for these regions are explained. Structural peculiarity on the excitation function for the resonance lines of argon atoms in Na${}^{+}$ $-$Ar collisions are observed and the possible mechanisms of this phenomenon are explored. The measured ionization cross sections for Na${}^{+}-$Ne and Ne${}^{+}-$Na collisions in conjunction with the Landau-Zener formula are used to determine the coupling matrix element and transition probability in a region of pseudo-crossing of the potential curves.

18 pages, 9 figures

References in corpus (1)

• Inelastic processes in K^(+)- He collisions in energy range 0.7 - 10 keV