A New Concept: The Fast Preequilibrium Charge State of Swift Ions in Solids
It is shown that fast ions of 127I travelling through carbon foils reach very rapidly an equilibrium charge state which is independent of the initial charge state. The full equilibration, corresponding to a higher charge state value, is achieved for much larger thickness of material traversed. This fast equilibrated process introduces the concept of “fast preequilibrium charge state” theoretically predicted by G. Maynard. H+ secondary ion yields are used to determine the charge state inside and outside the solid.
KeywordsCharge State High Charge State Carbon Foil Exit Surface Desorption Yield
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