Coincidence measurements of convoy electrons with specularly reflected ions

Electron emission spectra have been measured in coincidence with specularly reflected ions in grazing incidence collisions of carbon ions with a silicon(100) surface. Incoming C^q+ (q=1, 2 and 3) ions with total kinetic energies of 3.6 and 6.0 MeV were produced by the 7.0 MV Van de Graaff accelerator at Oak Ridge National Laboratory. Absolute yields of convoy electrons have been determined from these measurements. A recent theoretical calculation footnote C. O. Reinhold and J. Burgdörfer, Phys. Rev. A (to be published) describing electron emission spectra in grazing incidence ion-surface collisions has been extended to carbon ions colliding with a silicon surface. Comparison of the experimentally determined yields with the theoretical results have been made. The velocity dependence of the yield will be discussed.