Coincidence Investigations of Electron-Hydrogen Collisions
Electron-photon and electron-electron coincidence experiments are reported on, respectively, electron impact excitation of H(2p) and electron impact ionization of atomic hydrogen. The electron-photon angular correlations (at 40, 54.4, and 100 eV and θe = 10°, 15°, and 20°) are compared with calculations based on various approximations (such as hybrid close coupling, dwpo, or dwba). None of the theories appears to be completely satisfactory over the entire range of energy and angles examined. The H(e, 2e)H+ cross sections are similarly compared with various calculations. The results show the importance of correlations in the exit channel.
KeywordsDifferential Cross Section Electron Impact Excitation Channel Electron Multiplier Coincidence Investigation Asymptotic Constraint
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