The unit of atom scattering factor

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    Atom Scattering Unit
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SUMMARY

The unit of atom scattering factor is defined as e/atom, which refers to the scattering of X-rays primarily by electrons. This unit is derived from calculating the scattering of a single free electron and multiplying it by the number of electrons per atom. At larger scattering angles, the spatial distribution of electrons around the nucleus must be considered, leading to the form factor. For diffraction analysis, the positions of the atoms are also crucial in determining the scattering factor.

PREREQUISITES
  • Understanding of X-ray scattering principles
  • Familiarity with electron density in atoms
  • Knowledge of form factors in diffraction
  • Basic concepts of atomic structure and electron distribution
NEXT STEPS
  • Research the calculation of X-ray scattering factors
  • Learn about the role of electron density in diffraction patterns
  • Study the concept of form factors in crystallography
  • Explore the impact of atomic positions on scattering experiments
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Researchers in materials science, physicists studying crystallography, and anyone involved in X-ray diffraction analysis will benefit from this discussion.

einstein1921
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Hi,
I read in some papers which say the unit of atom scattering factor is e/atom.
what is the meaning of that?
thank you!
 
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Assuming that you are talking about the scattering factor for x-rays: X-rays get scattered almost exclusively by electrons, so it is natural to use electrons as unit of scattering.
You then calculate the scattering of a single, free electron. As most electrons are centered around atoms, you then multiply with the number of electrons/atom, and the number (or density) of atoms. At large scattering angles you have to take the spatial distribution of electrons around the nucleus into account, this gives you the form factor, for diffraction you need to consider the position of the atoms, ...
 

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