Forward and backward electron emission cross-sections for 23 MeVu-1 C, Ni and Au projectiles traversing C, Al, Ni, Ag, Au and Bi foils

A rather complete experimental study of forward and backward electron velocity spectra from thin foils bombarded with ions at constant velocity of 30 atomic units (23MeV u-1) was performed. Three different beams (12C3+, 58Ni14+ and 197Au36+) and six different targets (12C, 27Al, natNi, natAg, 197Au and 209Bi) of approximately 90 μg cm-2 thickness were used. This procedure allowed to study the evolution of electron emission (velocity and angular distributions) for the [projectile; target] matrix [C, Ni, Au; C, Al, Ni, Ag, Au, Bi] in a wide angular range. The projectile and target dependence of absolute cross-sections for binary encounter-, Auger- and backward-emitted electrons are analyzed. (orig.)