Figure 2: Demonstration of the ideas expressed in Section  3.3. Starting from the single atom scattering results shown in Figure 1, (a) shows (top), the result of averaging the single atom scattering over scattering angles, (31), and (bottom), (32) for individual angles. In (b) is shown the effect of averaging over scattering angles at constant . It will be noted that although not zero, is at most 2-3% of the original single atom scattering, as shown in Figure 1.