Inelastic cross sections and charge states for B, C, N, and O ions moving in metals.

Abstract

We calculate the cross sections associated with the electronic capture and loss of B, C, N, and O ions moving in a solid target with velocities vapprox.Zv/sub 0/ (where v/sub 0/ is the Bohr velocity). Three mechanisms are considered: Auger processes, whereby an electron is captured or lost creating an electronic excitation in the solid; resonant processes, coherently induced by the target crystal potential; and direct capture of electrons from the target inner shells. Atomiclike processes control the charge transfer for the velocities vapprox. >Zv/sub 0/. The distribution of charge states has been calculated as a function of the ion velocity. Good agreement is found with the available experimental data.