K. Mortensen
Department of Solid State Physics, Risoe National Laboratory, DK-4000 Roskilde, Denmark
Small angle X-ray and neutron scattering provides tools for investigation of structures on the length
scale 10 to 1000 A. This is the length scale which is relevant for many topics within soft materials,
like biological macromolecules, polymers, colloids, etc. The very large difference between the
scattering amplitude of neutrons by regular hydrogen and deuterium makes neutron scattering a very
important technique within soft condensed matter. The basic theory for small angle scattering is
reviewed. Experimental results obtained by small angle scattering are shown, with emphasis on soft
materials.