Cross section for stripping of argon ions in atomic collisions with argon gas at energies from 2 to 15 keV per incident charge

Abstract

Cross sections for the stripping of one electron from ${\mathrm{Ar}}^{+}$, ${\mathrm{Ar}}^{2+}$, and ${\mathrm{Ar}}^{3+}$ ions in single collisions on argon atoms have been measured. The measurements were made at energies from 2 to 15 keV per incident-ion charge. The growth-rate method has been used to check that the single-collision condition is realized. Cross sections are then deduced. During the collision, incident ions are scattered out of the acceptance angle of the analyzing device: An estimate of losses is made, and corrected cross sections are proposed. Comparisons to previously published data are attempted: For ${\ensuremath{\sigma}}_{1,2}$ one value at 6 keV exists which is in fair agreement with our value; for ${\ensuremath{\sigma}}_{2,3}$ our value at 30 keV coincides with the single ${\ensuremath{\sigma}}_{2,3}$ value existing.