Étude du contraste et de son influence sur les déterminations de l'intensité diffusée et du rayon de giration dans les systèmes de macromolécules hétérogènes

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Abstract
It is known, in small angle scattering experiments, the notion of contrast is important. This is particularly true for the neutron technique. This notion is expressed in terms of an effective scattering length and allows the experimental data for heterogeneous macromolecules dispersed in a solid or liquid matrix to be correctly interpreted. In particular the variation of the square of the apparent radius of gyration with the mean effective scattering length is discussed.