High concentration isotope label, SANS

To obtain Rg and the correlation lengdi ( ) of the concentration fluctuations we make use of die SANS high concentration isotope labeling method [12-14], which allows the determination of bodi parameters for semidilute polymer solutions. The coherent scattering cross section (dSd 2 in units of cm ) of an inctxnpressible mixture of identical protonated and deuterated polymer chains dissolved in a solvent is given by [4,5,14] ... 

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