Abstract
High resolution electron spectra haven been taken for fast heavy ions at 1.78 and 5 MeV/u as well as for electrons of equal velocity incident on atomically clean Si targets. Various LVV-Auger electron structures are identified and for amorphous Si these peaks show a shift towards lower energy when the charge of the projectile is increased. This finding points to a nuclear-track potential inside the ion track. The comparison of the Auger electron spectra for amorphous Si and crystalline Si(1 1 1) 7×7 gives clear evidence for phase effects in the short-time dynamics of ion tracks.
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