The Anderson effect occurs in a dielectric aether Indications for the existence of a dielectric medium
Allegedly 2 γ-photons of energy E > 1, 022 MeV can produce an electron-positron pair (= Positronium, Ps). But this occurence of Ps is only possible in the presence of a “catalysator”, namely a molecule. The lattice of the molecule acts obviously as a buffer in order to bounce the positronium. The occurrence of Ps is not due to a transformation of energy into mass that takes place in vacuity.