Thermal-energy charge transfer of Ar+ with H2O: Internal and kinetic energy of the product H2O+ |
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Authors: | R Derai S Fenistein M Gerard-Aïn TR Govers R Marx G Mauclaire CZ Profous C Sourisseau |
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Affiliation: | Centre de Recherches Nucléaires et Université Louis Pasteur, Laboratoire de Physique des Rayonnements et d''Electronique Nucléaire, 67037 Strasbourg Cedex, France |
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Abstract: | The reaction of Ar+ with H2O has been investigated at near-thermal energy. The product ions H2O+ and ArH+ account for 90 and 10% of the total reaction rate, respectively. Kinetic energy measurements and emission spectroscopy of the H2O+ product ions are reported. It is concluded that at least 60% of H2O+ ions are in the X? state with ≈2.4 eV vibrational energy while up to 40% are in the à state with a mean vibrational energy of 1.4 eV; the à state vibrational distribution has been determined. It is shown that both H2O+ states are populated via an energetically “non-resonant” charge transfer process. |
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