Absolute scattering cross-section

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The absolute scattering is the scattering intensity given in correct absolute units (as opposed to relative unites); from this quantity one can make quantify certain values (amount of material, molecular weight, etc.).

The easiest way to obtain absolute scattering is to measure a known standard (glassy carbon, water, etc.). In small-angle scattering:


  • I(q) is the scattering intensity, in arbitrary units
  • I_0 is the apparent source intensity (incident beam), in arbitrary units
  • is the solid angle subtended by detector
  • t is sample thickness
  • is the linear absorption coefficient
  • is the differential scattering cross-section per unit volume per unit solid angle (units cm−1</math>)

See Also

  • J. Appl. Cryst. 1972, 5, 315-324.
  • J. Appl. Cryst. 1983, 16, 473-478.
  • Acta Metall. Mater. 1991, 39, 11, 2477-2487.