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Rotationally inelastic scattering of methyl radicals with Ar and N2

Research output: Contribution to journalArticle (Academic Journal)

Original languageEnglish
Article number014306
Number of pages10
JournalJournal of Chemical Physics
Issue number1
Early online date6 Jan 2015
DateE-pub ahead of print - 6 Jan 2015
DatePublished (current) - 7 Jan 2015


The rotationally inelastic scattering of methyl radical with Ar and N2 is examined at collision energies of 330 ± 25 cm(-1) and 425 ± 50 cm(-1), respectively. Differential cross sections (DCSs) were measured for different final n' rotational levels (up to n' = 5) of the methyl radicals, averaged over k' sub-levels, using a crossed molecular beam machine with velocity map imaging. For Ar as a collision partner, we present a newly constructed ab initio potential energy surface and quantum mechanical scattering calculations of state-resolved DCSs. These computed DCSs agree well with the measurements. The DCSs for both Ar and N2 collision partners are strongly forward peaked for all spectroscopic lines measured. For scattering angles below 60°, the theoretical CD3-Ar DCSs show diffraction oscillations that become less pronounced as n' increases, but these oscillations are not resolved experimentally. Comparisons are drawn with our recently reported DCSs for scattering of methyl radicals with He atoms.

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Accepted: 10/12/2014

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  • JCP article Tkac et al 2015

    Rights statement: Copyright (2015) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Tkáč et al., J. Chem. Phys. 142, 014306 (2015) and may be found at:

    Final published version, 3.68 MB, PDF document


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