What is the PDF?
- (a) The red ball is a C60 molecule. C60 forms a solid by the molecules clustering (b). The scattering and PDF are shown in (c) and (d) respectively.
- Sit on an atom and look at your neighborhood. The nearest neighbor is at 1.4A distance, the second neighbor at 2.2A and so on. There are sharp peaks in G(r) at these positions. This is the structural information in the PDF.
- There are no sharp peaks beyond 7.1A, the diameter of the ball because the balls are spinning with respect to each other. The PDF can see this.