Recoil-charge-state–target-K-Auger-electron coincidences: A technique to study excitation patterns inK-Kcharge transfer

We have measured coincidences between Ne K Auger electrons emitted after impact excitation by hydrogenlike ${\mathrm{F}}^{8+}$ and bare ${\mathrm{F}}^{9+}$ projectiles at 0.53 and 0.23 MeV/u collision energies and the recoiling Ne target ion in a well-defined charge state. The quasiresonant K-K charge-tgas-atom pairs to calculate adiabatic potentials for some low-lying states. Using the calculated potentials, broadening and shift rates of resonance lines of ${\mathrm{Sr}}^{+}$, ${\mathrm{Ca}}^{+}$, and ${\mathrm{Mg}}^{+}$ perturbed by Ar and He have been calculated and compared with experiments. The overall agreement is good.