Noncoincident Measurements of Angular Electron Distributions

If a coincident electron distribution 7 (, ) corresponding to a projectile scattering angle is integrated over all azimuth angles p and scattering angles one obtains the noncoincident distribution 

An example for deviations from symmetry due to quasimolecular effects was studied by Stolterfoht et They analyzed shapes of He 

Unfortunately the electron spectra from + He collisions are also influenced by several other effects. Zwakhals et have, for example, shown that a broad spectrum of traveling velocities has to be taken into account for a qualitative interpretation of these spectra. Therefore, measured line shapes are influenced by several effects which cannot clearly be separated from each other. 

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