Abstract :
The inelastic mean free path IMFP.values for organic materials are very limited. Numerous data have been published
mainly for elemental solids, binary alloys and semiconductors. Generally, the IMFP values for different energies can be
determined from the theoretical models involving the optical data, from predictive formulas, and from the experimental
method called the elastic peak electron spectroscopy EPES.. In the present work the IMFPs in N– CH. polyacetylene x
unstretched., synthesised according to Naarmann and Theophilou, and this polyacetylene doped with Pd were determined.
The IMFPs energy dependence for the above samples has been obtained from the EPES in the primary electron energy range
of 200–5000 eV. The experimental data have been recorded using three different spectrometers and compared with the
theoretical data available. q1999 Elsevier Science B.V. All rights reserved
