THEORETICAL STUDIES ON INELASTIC COLLISIONS OF ELECTRONS WITH ATOMS AND MOLECULES.
Abstract
Electron exicitation cross sections of the transitions between the three spin multiplets J = 0,1,2 of the ((1s)2(2s)2(2p)4)3p ground state of the neutral oxygen atom were calculated for electron energies of 500-10,000K using the method of partial-wave analysis. Under an exact-resonance approximation, the scattering equations for the s-wave and p-wave can be obtained by numerical iteration. Vibrational excitation cross sections of diatomic molecules were calculated using the Born approximation by including the polarization interaction between the incident electron and the molecule. For the non-polar molecules, the polarization term increases the cross sections by an order of magnitude or more over the previous calculations, while in the case of the CO molecule, the contribution from the polarization term is comparable to that from the monopole-dipole interaction. The method of close coupling has been applied to calculate the electron excitation cross sections of helium. For the 1P states the close-coupling cross sections are nearly the same as the Born values, but the former became four times and forty times larger than the latter for 1D and 1F, respectively. The increase in cross sections may be ascribed to the indirect coupling via the 1P states. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1968
- Accession Number
- AD0674065
Entities
People
- Chun C. Lin
Organizations
- University of Oklahoma