Similarity of structure functions associated with different overlaps, scaling law

3 Similarity of structure functions associated with different overlaps, scaling law 

In order to determine the screening length e of a solution with overlap, by extrapolation of measured values of the scattered intensity 

Let 7(0) then be the value obtained by extrapolating at q = 0 the measured scattered intensity. In Fig. 15.24, we plotted the quantities 

If the function /(0)//(q) is universal the two results must superimpose after renormalization of the abscissa. We then draw three straight lines parallel to 

Neutron scattering (from Farnoux16). The lines parallel to the horizontal axis are used to show that the curves are affine. 

---