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Three‐isotopic‐substitutions method in small‐angle neutron scattering
Author(s) -
Pavlov M. Y.,
Serdyuk I. N.
Publication year - 1987
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889887087053
Subject(s) - scattering , biological small angle scattering , small angle neutron scattering , neutron scattering , molecular physics , deuterium , neutron , chemistry , small angle scattering , neutron diffraction , physics , crystallography , optics , atomic physics , nuclear physics , crystal structure
A new method is proposed for the study of the structure and arrangement of components in multi‐component particles. In this method the difference between the scattering curve of a solution containing two types of structurally identical particles differing only in degree of deuteration and the scattering curve of a solution containing particles of a third type deuterated to an intermediate degree is considered. This difference scattering curve is distinguished only by a numerical multiplier from the `vacuum' scattering curve of the particle in which the scattering density is equal to the difference between the scattering densities of particles of the first and second types. This means that components protonated (deuterated) to the same degree within particles of the three types considered do not contribute to the difference scattering curve and, consequently, are `invisible' to neutrons. The difference scattering curve depends neither on the solvent isotopic content nor on interparticle interference and particle association. Possible applications of the method to a study of the structure of macromolecules in solution are discussed.