Theoretical Calculation of Fully Differential Cross Sections for Electron-Impact Ionization of Hydrogen Molecules
We have recently proposed the orientation averaged molecular orbital (OAMO) approximation for calculating fully differential cross sections (FDCS) for electron-impact ionization of molecules averaged over all molecular orientations. Orientation averaged FDCS were calculated for electron-impact ionization of nitrogen molecules using the distorted wave impulse approximation (DWIA) and the molecular three-body distorted wave (M3DW) approximation. In this paper, we use the same methods to examine the FDCS for ionization of hydrogen molecules. It is found that the DWIA yields reasonable results for high-energy incident electrons. While the DWIA breaks down for low-energy electrons, the M3DW gives reasonable results down to incident-electron energies around 35 eV.
J. Gao et al., "Theoretical Calculation of Fully Differential Cross Sections for Electron-Impact Ionization of Hydrogen Molecules," Journal of Physics B: Atomic, Molecular and Optical Physics, Institute of Physics - IOP Publishing, Jan 2006.
The definitive version is available at http://dx.doi.org/10.1088/0953-4075/39/6/002
National Science Foundation (U.S.)
Keywords and Phrases
OAMO; Orientation Averaged Molecular Orbital Approximation; Electron-impact ionization
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