Authors: D Beck H Förster
Publish Date: 2005/03/15
Volume: 240, Issue: 2, Pages: 136-152
Abstract
In a crossed beam experiment Katoms are velocity analysed before and after collisions with thermally distributed CO2 molecules The dependence of the scattering on CMS angle for 6 °≲ϑ≲28 ° and on translationalrotational energy transfer from 10 to 50 of the initial relative collision energyE is measured forE=168 and 202 × 10−14 erg The energy transfer corresponds to high rotational excitation of CO2 6≲Δj≲22 if the average levelj=20 before the collision is taken to be the representative initial state Independent of the amount of energy transfer the inelastic scattering increases towards small angles Average partial cross sections reduced to transitions between single levels are estimated to be considerable fractions of the gas kinetic cross section at ϑ=20 ° The analysis strongly suggests the formation of a longlived collision complex in the encounter
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