en 4.3 EFFECT OF FRACTIONATION ON CONTOUR RATIO SCALING FUNCTIONS DOE/NY . Date from references 12, 13, and 17 were used to derive the r . and r(c) values plotted in Figs. 1 and 2, respectively. These curves indicate that rrp (or r(c)) increases with downwind distances so that there is less fractionation of the radionuclides in the smaller particles. Comparison of the Diablo-Shasta curve with Coulomb C curve