Calculation of the Cross Section of Electron-Atom Inelastic Collisions

摘要

The electron excitation cross sections of the 63P1 to 63P2 in mercury was investigated. A partial wave analysis was performed and the two-channel approximation used to remove the angular dependence of non-diagonal interaction potentials. For the partial wave of low l, the cross sections were calculated by the method of exact resonance while the Born approximation was used for the cases of large l. The calculation of the electron excitation cross sections of the (2p)4 1D > (2p)4 1S transition in oxygen was made by means of the usual partial wave method in the coupled representation. For l = 0 and l = 1, the exchange effect between the incident electron and the atomic electrons must be taken into account and the exact-resonance approximation may be used to decouple the differential equations. The partial cross sections with higher l may be calculated by the usual Born approximation. The problem of excitation of the vibrational energy levels of diatomic molecules by electron impact was studied. Calculations of the vibrational excitation cross sections for polar diatomic molecules were made by taking the interaction potential as the monopole-dipole type. The effects of the interaction of the incident electron and the induced dipole were examined. (Author)