# Tag Archives: Corrections

## Revisiting observability in polydisperse systems: “real” polydispersity

edited on 2011-07-20 14:51 to add equation defining observability Of course I could not leave you hanging after the last post with that question “does the observability still scale with the radius squared for samples with more than two particles?”. Short answer: yes. Long answer: mostly, with some interesting lessons w.r.t. q-angles and limitations. Click [...]

## Observability in polydisperse systems. What is all the accuracy for?

Abstract of this post: In this post, I will show that for a spherical two-particle system, the observability of the smaller particle scales with the inverse squared radius, quite different from the scattering power, which scales with the radius to the sixth power (volume squared). This means that scattering data with 1% error can be [...]

## Does it matter part 2: polarization factor and spherical corrections

In this series of posts, we take a quick look at some uncommon corrections you can do to your scattering patterns and we evaluate whether they are worththe trouble or not. The goal is to arrive at intensities which are within 1% of their correct values. In the previous post, we looked at the sample [...]

## Baby, and the perfect measurement made easier

I apologise for my low activity in the last few weeks. Those of you who are following my Twats (Twitter messages) will probably be able to link this to our newborn baby. Now growing strongly for two weeks, having to wake up every four hours in what seems like the longest beamtime ever have left [...]

## Does it matter? part 1: sample direction-dependent absorption

This series is part of a set to determine which corrections matter when. We all heard -or read- about corrections Small-angle Scatterers do not need to do, because they are supposedly negligible. Let’s look at some of them and determine if this is really true or not.   The first looks at the sample direction-dependent [...]

## Work in Progress: How to do a SAXS measurement well

Hi all. For a work-related project, I have been developing some software and writing some documentation. This documentation is still a work in progress (as is the software), and it lacks much graphics. However, I think it could serve as a good introduction to those who want to do a good SAXS measurement, or those [...]