Ion neutralization at ionic crystal surfaces

Results of experimental and theoretical investigations of low-energy ion-su rface charge exchange on the surface of LiF single crystals are described. It is shown that, for adequate interpretation of experimental data on ion n eutralization, it is important to use the exact overlap integrals of electr on orbitals of interacting particles instead of the commonly used exp(-r/r( 0)) hopping integrals. The many-particle time-dependent Anderson-Newns Hami ltonian is used to describe ion-surface interaction. (C) 1998 Elsevier Scie nce B.V. All rights reserved.