Quenching Collisions of Low-Energy Metastable Multiply-Charged Argon Ions
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Quenching rates have been measured for selected metastable levels of Ar(q+) ions (q = 2, 3, 9, and 10) stored in a Kingdon ion trap, with mean energies of 262q eV and 181q eV. Effective quenching cross sections derived from these rates are found to be comparable to electron-capture cross sections of Ar(q+)-Ar collisions studied independently using ion-beam techniques. This implies that quenching is dominated by electron-capture collisions which change the ion charge state.
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Physics, Atomic, Molecular and Chemical