[phenixbb] anomalous difference map
pjeffrey at princeton.edu
Mon Sep 8 10:10:18 PDT 2014
In your first sentence your meaning of "difference map" is:
( F_obs - F_calc ), phases
For an anomalous difference map you're calculating:
( F(+) - F(-) ), phases-90
So you would still expect to see a peak in the anomalous difference map
in the presence of the anomalous scatterer since you are not subtracting
off its contribution to the scattering.
There probably would be (very) small differences in the phases dependent
on whether you explicitly model the Br as an anomalous scatterer or not
but I have never experimented to see if that makes a small impact on an
anomalous difference map.
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