The Ionization Degree of Ar Atoms Single Scattered from Pure Metal and Alloy Surfaces

Abstract

AbstractA procedure of deflection of backscattered neutral atoms with low energy E° = (250÷3000) eV based on neutral ionization by electron impact has been developed. The ionization degrees η+of Ar atoms single scattered at the angle θ=138° from V and VI period metal polycrystal surfaces as well inelastic energy losses Q have been measured. It has been found that both η+ and Q changed nonmonotonically within each period. It has been shown that for the elements of the same group under otherwise equal conditions η+ at the scattering from V period elements appeared to be always higher than those for the VI period. It has been established that at scattering from MoRe alloy surface η+ in peaks of single scattering from Mo and Re the metal target values coincided with corresponding values measured for pure Mo and Re metal targets. Using the results obtained one could draw some conclusions about the dependence of the charge state on the target structure.