| Autor: |
Duca, Mariana D. |
| Předmět: |
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| Zdroj: |
Journal of Chemical Physics; 10/8/2004, Vol. 121 Issue 14, p6750-6758, 9p, 4 Charts, 8 Graphs |
| Abstrakt: |
The effect of kinematic parameters (relative velocity vrel, relative momentum prel, and relative energy Erel) on the rotational and rovibrational inelastic scatterings of 00K0S1 trans-glyoxal has been investigated by colliding glyoxal seeded in He or Ar with target gases D2, He, or Ne at different scattering angles in crossed supersonic beams. The inelastic spectra for target gases He and D2 acquired with two different sets of kinematic parameters revealed no significant differences. This result shows that kinematic factors have the major influence in the inelastic scattering channel competition whereas the intermolecular potential energy surface plays only a secondary role. The well-defined exponential dependence of relative cross sections on exchanged angular momentum identifies angular momentum as the dominant kinematic factor in collision-induced rotationally and rovibrationally inelastic scatterings. This is supported by the behavior of the relative inelastic cross sections data in a “slope-prel” representation. In this form, the data show a trend nearly independent of the target gas identity. Representations involving Erel and vrel show trends specific to the target gas. © 2004 American Institute of Physics. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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