Bruker AXS Overview of Biological SAXS Webinar 20120614
Bruker AXS Overview of Biological SAXS Webinar 20120614
Bruker AXS Overview of Biological SAXS Webinar 20120614
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Fourier Transformation – The P(r) Function<br />
P(<br />
r)<br />
<br />
1<br />
2<br />
<br />
2<br />
<br />
0<br />
I(<br />
q).<br />
q<br />
2<br />
sin( qr)<br />
qr<br />
dq<br />
Limit:<br />
q min .D max ≤ π<br />
P r<br />
= T( I(q))<br />
The Pair Distance Distribution Function P(r) is the Fourier Transform <strong>of</strong> the S<strong>AXS</strong><br />
curve – it is a real-space function and hence intuitively better suited for modelling<br />
Graphics courtesy <strong>of</strong> Michal Hammel S<strong>AXS</strong> Consulting www.saxs.org<br />
20