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Fe II level populations in a hollow cathode discharge

Affiliation:	1. Accelerator Division, TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada;2. Department of Physics and Astronomy, University of Manitoba, Winnipeg, MB R3T 2N2, Canada;3. Department of Physics, Simon Fraser University, Burnaby, BC V5A 1S6, Canada;4. Department of Chemistry, Simon Fraser University, Burnaby, BC V5A 1S6, Canada;5. Department of Physics, Saint Mary''s University, Halifax, NS B3H 3C3, Canada;1. Laboratorio de Innovación en Plasmas, Edificio Einstein (C2), Campus de Rabanales, Universidad de Córdoba, 14071 Córdoba, Spain;2. Groupe de Physique des Plasmas, Université de Montréal, Montréal H3C 3J7, Québec, Canada

Abstract:	Relative populations of 232 excited levels of the Fe⁺ ion have been measured in a hollow cathode discharge in neon and in argon. The population distribution shows that thermal charge exchange between noble gas ions and ground level Fe atoms is responsible for most of the excited Fe⁺ population. the cross section for thermal charge exchange is enhanced when the excited Fe⁺ final level has the same 3d⁶(⁵D) core configuration as the initial Fe atom ground level.

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