Friday, November 04, 2005

Anomalous signal vs Noise

Reading Wanatabe et al. (as promised) , Figure 1 struck my eye, especially in comparison to figure 4 of Zwart, Acta D61, 1437-1448. Note also the dip the Bijvoet amplitude ratio at about 4 Angstrom, where the Wilson plot has a local maximum. It is nice to see that classic phase relations used in OASIS do help ....

I did glance over Soares & Vekther as well. Triplet phases are wicked, not sure this would work out for 'real world' problems though. Besides that, I wonder how the triplet measurements can be used more directly in density modification schemes: they should influence the phase probability distributions significantly (and clearly things are not independent).

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