Investigation of δ-electron emission in collisions of highly charged fast Ne projectiles with carbon-foil targets

The angle and energy dependence of electron emission following the interaction of 70–170-MeV ${\mathrm{Ne}}^{\mathit{q}+}$ (q=7,10) projectiles with 20 and 100 μg/${\mathrm{cm}}^2$ carbon foils has been investigated experimentally. Absolute emission yields were determined for ejection angles ranging from 0° to 180° and electron energies from 10 eV to 6 keV for normal-incidence ion beams. The experimental δ-electron spectra are compared to results from a newly developed theoretical model based on a separation of energy loss and angular scattering for secondary electrons.