TRANSPORT OF SWIFT HEAVY-ION-INDUCED ELECTRONS IN SOLIDS

We investigated the transport of heavy ion induced electrons in solids by both numerical simulations and measurement: Electron yields and do uble differential spectra of electrons have been studied as a function of target thickness d. We measured electron yields from the beam entr ance and exit surfaces of thin carbon foils bombarded with swift highl y charged heavy ions at 13.6 MeV/u (Ar; foil thickness d approximate t o 4 mu g/cm(2)-360 mu g/cm(2)) and 74 MeV/u (Ni, d approximate to 3 mu g/cm(2)-50 mg/cm(2)) and compared the results to numerical simulation s. Also, double differential (in velocity and angle) spectra of electr ons emitted into the forward direction from C foils induced by Ar17+ a t 13.6 MeV/u reveal the dependence of the shape of the ''binary encoun ter'' electron peak on thickness d.