M. Gonin et al., CHARGE-EXCHANGE OF ATOMS WITH HIGH 1ST IONIZATION-POTENTIALS IN CARBON FOILS AT E-LESS-THAN-OR-EQUAL-TO-35 KEV U/, Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 94(1-2), 1994, pp. 15-21
Charge exchange properties of high first ionization potential atoms pa
ssing through thin carbon foils are discussed in the context of charge
transfer models. A model is presented in which the charge state equil
ibrium within the solid is explained by the overlap of the atomic and
the solid state electron wave functions in k space. Outside the solid,
near the surface, charge exchange occurs by tunneling of electrons be
tween the carbon surface and the exiting projectile.