Calculations of electronic energy loss of fast molecules in amorphous carbon

Abstract

The energy loss of fast H 2 + in amorphous carbon has been calculated within the first Born approximation. We used two models: a simple Bethe-like estimate and an oscillator model. The basic input needed for both models is the dipole oscillator strength distribution for the target material. For amorphous carbon we applied a well etablished empirical set based on optical data. We find that the predictions compare well with each other, in particular that the shell corrections do not influence the proximity effect. The theoretical results are compared with experimental data.