ASA Plot

This plot shows the atomic scattering amplitude as a function of scattering angle s [nm^-1]. The plot for a particular atom and tabulation is displayed when a mouse click occurs in the atom row (Fig. 1).

Figure 1 Plot of the atomic scattering amplitude of Barium.

The plot shows the elastic and inelastic scattering amplitudes (Fig. 2).

Figure 2 Elastic and inelastic scattering amplitude as a function of scattering angle.

A popup menu attached to the plot allows to change the plot scale and to save the plot as a Mathematica notebook. The scattering amplitude can also be plotted as a function of the atomic number at s = 0. The tabulation from Doyle-Turner, Acta Cryst. A24 (1968) 390 or Smith-Burge, Acta Cryst. A15 (1962) 182 (Fig. 3a) and the tabulation from Weickenmeier-Kohl, Acta Cryst. A54 (1998) 283 (Fig. 3b) are pretty different for heavy atoms. It is advised not to use the DT-SB for atoms of atomic number larger than 40 (Zr).


Figure 3a Doyle-Turner or Smith-Burge ASA (s=0) as a function of atomic number.	Figure 3b Weickenmeier-Kohl ASA (s=0) as a function of atomic number.

Using the popup menu (Fig. 4) Mathematica notebooks are exported (WK.nb) and their evaluation leads to further ASA plots (5).

Figure 4 ASA plots popup menu.


Figure 5a ASA plot (real).	Figure 5b ASA plot (imaginary).

Figure 5c ASA plot TDS.	Figure 5d ASA all plots.

Figure 6 ASA plots for the different AFF sources.