One- and Two-Electron Excited States Produced by Electron Exchange, Excitation, and Electron Capture in Collisions of Fluorine Ions in Argon Gas at 34.8 MeV

High-resolution x-ray spectra have been used to obtain the relative intensities of transitions in fluorine ions that result from single collisions of ${\mathrm{F}}^{7+}$, ${\mathrm{F}}^{8+}$, and ${\mathrm{F}}^{9+}$ at 34.8 MeV in argon gas. Intensities of transitions resulting from direct electron capture to excited states have been compared to those produced by excitation processes. The importance of electron exchange in collisions in which inner-shell excitation occurs is indicated by the strong $(1s,2p)2{}_{}{}^3{}_{}{}^{}P_1^{}{}_{}{}^{}\to \left(1\mathrm{}{s}^2\right)1\mathrm{}{}_{}{}^1{}_{}{}^{}S_0^{}{}_{}{}^{}$ transition obtained with incident two-electron ions.