Abstract
Electron emission spectra in the neutralization of slow He 2+ on ajellium surface are calculated. We calculate the Auger transition rates and spectra of He 2+ to He + and He + to He 0 as well as the resonant neutralization rate of He 2+ to He + ∗. The spectra obtained in this way resemble the surface density of state (SDOS) convolutions at the two different ranges of energy of the two transitions. We also include another mechanism for electron emission: this is the electron cascade process induced in the metal by those Auger electrons that are not able to surmount the surface barrier. We then find a qualitative agreement with experiment. This suggests that information from the SDOS in the spectra is smeared out by electron cascades.
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