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Figure 5
The scattering intensities from a polydisperse three-phase mass fractal model of type I (see Fig. 3[link]), where region 1 is a ball and region 2 is the Cantor fractal. The parameters are described in the text. The vertical arrows represent the crossover position as estimated from equation (15)[link]. (a) The contribution of various terms to the scattering intensity (9)[link]: the full intensity (black solid line), the contribution of the `cross' terms (blue dashed line), and the contribution of the `diagonal' terms (red dotted line). The correlation terms are negligible on a double logarithmic scale. (b) The scattering intensity (black) and the contributions of the ball (blue) and mass fractal (red). Below the crossover point, the contribution of the mass fractal is negligible, while above it, the contribution of the ball is negligible. This is why the intensity is a convex function near the crossover point. (c) Contrast variation of the scattering intensity.

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