Attenuation Mechanisms Simple Scatter) (a)Simple Scatter(Rayleigh Scattering) The incindent photon energy is much less than the binding energy of the electron in an atom.The photon is scattered without change of energy. Low energy relatively unimportant.Attenuation Mechanisms ( Simple Scatter) ( a) Simple Scatter ( Rayleigh Scattering) The incindent photon energy is much less than the binding energy of the electron in an atom. The photon is scattered without change of energy. Low energy relatively unimportant