THE CALCULATION OF RESONANT ENERGY TRANSFER CROSS SECTION USING ELECTRON IMPACT DATA
Creators:Huo, Winifred M.
MetadataShow full item record
Publisher:Ohio State University
In the Born approximation neglecting exchange the differential cross section of energy transfer between two molecules in the gas phase is expressible in terms of the generalized oscillator strengths for the excitation of the individual molecules by electron impact. Thus, electron impact data can be used to calculate the Born energy transfer cross section and to determine the first order Intermolecular potential involved in this process. While the Born approximation is generally expected to hold at high kinetic energies, it is shown that under certain conditions it can also provide a good estimate of the total energy transfer cross section even at thermal energies. The conditions are: (1) the energy gap is small in comparison with the thermal energy, and (2) the existence of a Long range first order potential. These conditions are moat likely satisfied in collisions involving polyatomic molecules. Numerical examples will he given to illustrate these points.
Author Institution: Department of Chemistry, Mellon Institute of Science, Carnegie-Mellon University
Items in Knowledge Bank are protected by copyright, with all rights reserved, unless otherwise indicated.