  Monte carlo simulation of paths of a large number of impinging electrons in a
multi-layered solid allows to define area of spreading electrons (A) to capture
overall behavior of the solid. This parameter 'A' follows power law with
electron energy. Further, change in critical energies, which are minimum
energies lost corresponding to various electrons, as a function of variation in
lateral distance also follows power law nature. This power law behavior could
be an indicator of how strong self-organization a solid has which may be used
in monitoring efficiency of device fabrication.
