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Centric and acentric reflections: Difference between revisions
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→Reciprocal space
m (change "number of pi" to "multiple of pi") |
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Properties: centric reflections have only two phase possibilities, e.g. 0° and 180° (but in any case 180° apart), and centric reflections do not have an anomalous signal (can these properties be easily derived here?). | Properties: centric reflections have only two phase possibilities, e.g. 0° and 180° (but in any case 180° apart), and centric reflections do not have an anomalous signal (can these properties be easily derived here?). | ||
Furthermore, the "intensity statistics" of | Furthermore, the "intensity statistics" of acentric reflections | ||
(<math> P(|E|) = 2 |E| e^{-|E|^2} </math> ) | (<math> P(|E|) = 2 |E| e^{-|E|^2} </math> ) | ||
<gnuplot> | <gnuplot> | ||
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plot 2*x*exp(-x*x) | plot 2*x*exp(-x*x) | ||
</gnuplot> | </gnuplot> | ||
are different from those of | are different from those of centric reflections | ||
(<math> P(|E|) = \sqrt{\frac{2}{\pi}} e^{-|E|^2/2} </math> ) | (<math> P(|E|) = \sqrt{\frac{2}{\pi}} e^{-|E|^2/2} </math> ) | ||
<gnuplot> | <gnuplot> | ||