Figure 2
Dependence of transmitted anomalous signals on X-ray energy. Water is taken to approximate the absorptivity of typical macromolecular crystals, and we plot the product of the anomalous signal from sulfur (f′′, in electrons) with the X-ray transmission through various thicknesses of water (red, 300 µm; blue, 200 µm; black, 100 µm; cyan, 50 µm; green, 10 µm; magenta, 0 µm) as a function of X-ray energy. Symbols identify the Se K edge energy and selected relevant low-energy values. |