Theory of X-ray scattering by liquid macromolecules with heavy atom labels

Abstract

The present paper discusses pure liquid phases of long chain molecules each of them carrying heavy atoms « I » either at one end (case A) or at both ends (case B). For case A we find a non trivial I I correlation, due to the repulsion between carrier chains. For caxe B, the above effect competes against the direct correlation between I I pairs belonging to the same coil. Thus, although each coil is essentially gaussian, the overall I I correlation function is very different from a gaussian. Complications due tu possible specific associations between the heavy atoms are also discussed