Charge transfer and chemical reaction dynamics in hyperthermal O++NO collisions

The O+(4S)+NO(X 2Πr) collision system has been investigated in a guided-ion beam experiment. Absolute cross sections for production of NO+ and O2+ have been measured at collision energies from near thermal to ∼12 eV. Time-of-flight measurements of the NO+ product recoil velocities, at collision ener...

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Veröffentlicht in:The Journal of chemical physics 2000-01, Vol.112 (1), p.122-129
Hauptverfasser: Levandier, Dale J., Chiu, Yu-hui, Dressler, Rainer A.
Format: Artikel
Sprache:eng
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Zusammenfassung:The O+(4S)+NO(X 2Πr) collision system has been investigated in a guided-ion beam experiment. Absolute cross sections for production of NO+ and O2+ have been measured at collision energies from near thermal to ∼12 eV. Time-of-flight measurements of the NO+ product recoil velocities, at collision energies of 1.3, 3.3, 5.2, and 9.1 eV confirm two hyperthermal charge transfer channels with thresholds at 0.2 and 2.0 eV. A kinematic analysis indicates mechanisms that give rise to spin-forbidden NO+(X 1Σ+)+O(1D) and endothermic NO+(a 3Σ+)+O(3P) products, respectively. The O2++N channel is observed to have a threshold of 0.7±0.1 eV. Time-of-flight studies of the O2+ product at collision energies of 3.3 and 5.9 eV indicate a complex-mediated mechanism.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.480647