I have tried to find the mean free path for low energy electrons (e.g. secondaries with < 100 eV energy) in PMMA or other polymers in the literature, but the results seem to scattered across different studies using different radiation (e.g., X-rays, electrons) or are concentrated mainly in higher electron energies or different substances, primarily metals. I can only make an indirect inference, but would prefer a direct confirmation. It seems there has to be a study of this done somewhere. Can anyone point me to a reference? Many thanks in advance.
Regards,
FC