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Fig. 7

Figure 7. Attenuation in Pm (Z = 61), represented by Im (f) = f2. [/ρ] (in cm2/g) = f2 (e/atom)  2.902 09  105. Experimental data from Saloman, Hubbell and Scofield [34]. The extended range plotted shows the insignificance of Rayleigh scattering for all but the highest energies plotted (where the contribution reaches 1 %). The lower energy behavior illustrates the increasing uncertainty at lower energies. The near-edge structure of the "New Result" follows qualitative expectations unlike all others shown.

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