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Excitation functions for the reactions of Ar^+ with CH4, CD4, and CH2D2
Wyatt, J. R. Strattan, L. W. Chivalak, S. Hierl, Peter M.
Wyatt, J. R.
Strattan, L. W.
Chivalak, S.
Hierl, Peter M.
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Abstract
Integral reaction cross sections as a function of initial translational energy (0.4–30 eV c.m.) are reported for isotopic variants of the exoergic ion‐molecule reaction Ar++CH4 → ArH++CH3. The excitation functions, which maximize at about 5 eV and decrease at lower collision energies, appear to possess translational energy thresholds at about 0.1 eV. At the higher energies there is a large isotope effect favoring abstraction of H over D. The observed threshold behavior, unusual for exoergic reactions of positive ions, is discussed in terms of the formation of an ArCH4 + intermediate complex at low collision energies.
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This is the publisher's version, also available electronically from http://scitation.aip.org/content/aip/journal/jcp/63/11/10.1063/1.431267.
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1975-01-01
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American Institute of Physics
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Wyatt, J. R.; Strattan, L. W.; Chivalak, S.; Hierl, Peter M. (1975). "Excitation functions for the reactions of Ar^+ with CH4, CD4, and CH2D2." Jounal of Chemical Physics, 63:4582-4591. http://dx.doi.org/10.1063/1.431267