Question

Describe how to differentiate from rod shaped particles, disk shaped particles, and a detector background signal in Small Angle X - Ray Scattering (SAXS).

Answer 1

Differences in Rod shaped particles, Disk shaped particles & detector background signal.

1. Rod Shaped Particles:

When rod shaped particles are used in SAXS (Small Angle X-Ray Scattering) the incident angle and reflective angle of X-Ray beam would be different from disk shaped because of surface curvature of the particle, as shown in figure 1 below:

The rod shaped sample should kept in required orientation i.e. circular ends or curves surface, because scattering will be different from different surfaces.

2. Disk Shaped Particles:

In the disk shaped particles X-Ray scattering is much easy and informative, the maximum surface of the particle is exposed to the X-Rays as shown in figure 2 below:

3. Detector Background Signal:

Detector's background signal is used to analyse the atomic structure of the sample used in X-Ray Scattering.