Negative collision energy dependence of Br formation in the OH + HBr reaction
Literature Information
Dock-Chil Che, Takashi Matsuo, Yuya Yano, Laurent Bonnet, Toshio Kasai
The reaction between HBr and OH leading to H2O and Br in its ground state is studied by means of a crossed molecular beam experiment for a collision energy varying from 0.05 to 0.26 eV, the initial OH being selected in the state |JΩ〉 = | 〉 by an electrostatic hexapole field. The reaction cross-section is found to decrease with increasing collision energy. This negative dependence suggests that there is no barrier on the potential energy surface for the formation pathway considered. The experimental results are compared with the previously reported quantum scattering calculations of Clary et al. (D. C. Clary, G. Nyman and R. Hernandez, J. Phys. Chem., 1994, 101, 3704), and briefly discussed in the light of skewed potential energy surfaces associated with heavy–light–heavy type reactions.
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EC Thematic Network on Glow Discharge Spectroscopy for Spectrochemical Analysis 1999–2002
DOI: 10.1039/B304299P
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