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Soft Matter and Biological Physics

Eur. Phys. J. E 3, 283-290

A new approach to the problem of radiation scattering by multicomponent systems

H. Benoît1 - G. Jannink2

1 Institut Charles Sadron, 6 rue Boussingault, 67083 Strasbourg Cedex, France
2 Laboratoire Léon Brillouin, C.E. Saclay, 91191 Gif-sur-Yvette, Cedex, France

Received 7 January 2000 and Received in final form 29 May 2000

The formulation of the scattered intensity by compressible systems, based on the thermodynamics of the inverse correlation matrix, is re-examined and replaced by a direct decomposition of the correlation matrix. This approach confirms known results. It allows the derivation of several families of contrasts and offers new possibilities to interpret scattering experiments. It can be easily generalized, in the frame of the random phase approximation, to the scattering at $q\neq0$.

82.60.Lf Thermodynamics of solutions - 42.25.Fx Diffraction and scattering - 83.80.Es Polymer blends

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