Determination of p(r) from data file

Frequently Asked Questions about ATSAS small-angle scattering analysis program package
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ldrueda
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Determination of p(r) from data file

#1 Post by ldrueda » 2014.02.16 14:23

Hello,

I am new in SAXS, and now I have a data file with the scattering intensity vs q axis (Å-1).
I woule like to use either Gnom or Primus to obtain the p(r) curves. Could you please help me? I am not sure of the steps I should follow when using these programs.
regards

daniel

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AL
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Re: Determination of P(r) from data file

#2 Post by AL » 2014.03.13 15:39

  • Download and install ATSAS;
    open your data in primus (use "SAS Data Analysis" (primusqt.exe) if you are on Windows);
    go to Tools > Distance Distribution.
You will immediately get a p(r) function (right plot). The program will automatically select a data range and Dmax; you can adjust these values. Make sure your p(r) function looks good and the fit to the experimental data is good (left plot).

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