THE INTERACTION OF HYDROGENIC IONS WITH METAL AND SEMICONDUCTOR SURFACES

We present K-Auger spectra arising from collisions of hydrogenic C, N, O, F and Ne ions with p-conducting Si(100), Ni(110) and polycrystalli ne W surfaces for different beam energies and observation angles. Thes e spectra exhibit sharp peaks which, using Hartree-Fock atomic structu re calculations, can be assigned to distinct projectile states prior t o KLL decay. Moreover, we find that the measured spectra show target-s pecific features which can be explained by different free electron den sities in metals and silicon.