I want to analyze my SAXS data using Sasfit with Beaucage and Teubner-Strey function. But I have a question that do I need to fit the c_0, c_1, c_4 and alpha parameters in background or not. Does anyone know the reason that we have to fit the background parameter?
Hi Muchlis!
The Sasfit background is a function that you use just to adjust the intensity of the fitting. c_0 is like the constant for x, c_1 is for x² and c_4 is for x³. The ideia is try to get a good fit using a very, very low constant. I usually works with just c_0 in a 10^-4 order.If you increse this values you are probably fitting your data with other things than the correct one.
Best regards,
Juliane Pelin
Hi,
SASfit is a program primarily for model-based analysis of SAS data, with an easy to use ... Two examples show the analysis of the small-angle X-ray scattering (SAXS) ... In linear context, An external file that holds a picture, illustration, etc. ... for each contribution, reflecting attraction and repulsion of scatterers in the sample.
Kindly refer the Link:
https://kur.web.psi.ch/sans1/SANSSoft/sasfit.pdf
Onet has to take care of background scattering, which is basically liquid scattering not from real sample under investigation.
For the procedure my publication if POLYMER JOURNAL (JAPAN) explains better.
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