Guided-ion beam cross section and product ion time-of-flight (TOF) measurements are presented for the reaction over the center-of-mass collision energy range of 0.05–18 eV. Despite a large number of exothermic channels, the total reaction cross section at low energies is more than two orders of magnitude smaller than the capture cross section. A common energy onset for charge-transfer, and products is observed at above which the total cross section for these channels rapidly rises with energy, eventually exceeding 5 Å2. Above 4 eV, the and products also become significant, and weaker channels producing and are also identified. The fragment is interpreted as being primarily a dissociative charge transfer (CT) channel at collision energies above ∼3.79 eV, while the threshold for forming can be associated with a channel. The TOF measurements demonstrate that efficient state formation occurs above ∼2.7 eV. The onset at is attributed to a transition state associated with an excited quartet hypersurface.
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1 October 1998
Research Article|
October 01 1998
Collision energy dependence and product recoil velocity analysis of charge-transfer and chemical reaction channels
Yu-hui Chiu;
Yu-hui Chiu
Air Force Research Laboratory/VSBM, 29 Randolph Road, Hanscom Air Force Base, Massachusetts 01731-3010
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Rainer A. Dressler;
Rainer A. Dressler
Air Force Research Laboratory/VSBM, 29 Randolph Road, Hanscom Air Force Base, Massachusetts 01731-3010
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Dale J. Levandier;
Dale J. Levandier
Air Force Research Laboratory/VSBM, 29 Randolph Road, Hanscom Air Force Base, Massachusetts 01731-3010
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Skip Williams;
Skip Williams
Air Force Research Laboratory/VSBM, 29 Randolph Road, Hanscom Air Force Base, Massachusetts 01731-3010
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Edmond Murad
Edmond Murad
Air Force Research Laboratory/VSBM, 29 Randolph Road, Hanscom Air Force Base, Massachusetts 01731-3010
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J. Chem. Phys. 109, 5300–5307 (1998)
Article history
Received:
April 28 1998
Accepted:
June 29 1998
Citation
Yu-hui Chiu, Rainer A. Dressler, Dale J. Levandier, Skip Williams, Edmond Murad; Collision energy dependence and product recoil velocity analysis of charge-transfer and chemical reaction channels. J. Chem. Phys. 1 October 1998; 109 (13): 5300–5307. https://doi.org/10.1063/1.477148
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