Porod's law is concerned with wave numbers q that are small compared to the scale of usual Bragg diffraction; typically $${\displaystyle q\lesssim 1{\text{ nm}}^{-1}}$$. In this range, the sample must not be described at an atomistic level; one rather uses a continuum description in terms of an electron density or a … See more In X-ray or neutron small-angle scattering (SAS), Porod's law, discovered by Günther Porod, describes the asymptote of the scattering intensity I(q) for large scattering wavenumbers q. See more Since the advent of fractal mathematics it has become clear that Porod's law requires adaptation for rough interfaces because the value of … See more If the interface is flat, then Porod's law predicts the scattering intensity $${\displaystyle I(q)\sim Sq^{-4}}$$ where S is the surface area of the particles, which can … See more as Form factor asymptote For a specific model system, e.g. a dispersion of uncorrelated spherical particles, one can derive Porod's law by computing the scattering function S(q) exactly, averaging over slightly different particle radii, and … See more
Elastic positron–proton scattering at low Q The European …
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WebThe European Physical Journal A (EPJ A) presents new and original research results in Hadron physics and Nuclear physics WebSmall-angle scattering (SAS) is a scattering technique based on deflection of collimated radiation away from the straight trajectory after it interacts with structures that are much … WebDec 27, 2011 · A new function; x-ray structure factor intensity at a given Q as a function of r, S(Q) (peak)(r) is introduced, suggesting that the observed low-Q peak intensity depending on n is originated from liquid structures at two r-region of 5-8 and 8-15 Å for all ionic liquids examined except for n = 12. Short- and long-range liquid structures of [C(n)mIm(+)][TFSA( … list of union regiments by state