Time-of-Flight Study of Low Energy Charge Transfer Reactions of Ar Ions and Metastable Ar Ions with H2 Molecules

Translational energies of secondary neutral atoms produced by the charge transfer reactions in collisions of argon ions Ar + and metastable argon ions Ar +M with H 2 . molecules have been measured by a time-of-flight technique at ten eV region. Two kinds of charge transfer processes were examined; reaction between ground state reactants Ar + +H 2 →Ar+H 2 + , and formation of metastable atoms Ar M from metastable ions Ar +M +H 2 →Ar M +H 2 + . The ground state Ar atoms were predominantly scattered with little or no angular deflection and with little energy exchange, resulting the H 2 + in vibrational state v '=1 for Ar + ( 2 P 3/2 ) and v '=2 for Ar + ( 2 P 1/2 ). On the other hand, the Ar M atoms were yielded with being deflected in relatively wide angle and releasing considerable amount of internal energy (≥1 eV).