Abstract
Argon ion bombarded KCl(100) surfaces are compared with air and vacuum cleaved surfaces by LEED and AES experiment. When Ag was evaporated on both argon ion bombarded and air cleaved KCl surfaces, the former showed better epitaxial growth. From these surfaces, Cl signals were always observed from AES curve. Therefore, a great probability of K and Cl diffusion into Ag film can be expected. When a total secondary electron curve was taken from KCl surface, elastic peak heights at higher voltages (up to 1 KeV) were very small. They are probably due to dissociation of the KCl surface. This is clearly related to LEED observable voltage regions. Alkali halides are materials from whose surfaces LEED patterns are observable up to several hundred voltages. However, Ta and MgO samples can be observed by LEED up to 1 KeV.