Scattering middle-angle

The subarea of middle-angle X-ray scattering (MAXS) covers the characteristic scattering of liquid-crystalline structure and rigid-rod polymers. 

Figures 5, 6 and 7 represent various computer simulations pertaining to the FDCS for electrons emitted into the scattering plane in 3.6 MeV amu Au24+,53+ i jjg collisions. The experimental results are absolute with the theoretical data normalized to them. The results are shown in the form of polar plots with the FDCS plotted as polar radial functions of the scattering (polar) angle. The figures contain six different models, each of which has been labelled for discussion. The top left (a) is FBA, top middle (b) is CDW-EfS, without internuclear potential, top right (c) CDW-EfS+nn. The bottom left (d) is CDW-EfS with RffF wavefunctions (CDW-EfS+RHF),...

In this paper we present three techniques for the study of thin middle phase films adsorbed on emulsion droplets. Film thicknesses have been measured by small angle X-ray scattering, contact angles of adjacent droplets have been measured in flocculated emulsions, and much direct evidence for such films has been observed visually in the spinning drop interfacial tensiometer. 

Figure 14 shows a representative 2-TS trajectory, which demonstrates that the 2-TS paths follow a direct S-bend insertion mechanism. The trajectory passes through the middle of the molecule, and avoids the Cl this forces the products to scatter into negative deflection angles. The 2-TS QCT total reaction... 

Figure 5.34 Small-angle X-ray scattering showing interlamellar fundamental peaks from C4 phosphonate (42) tubules (top), C3 phosphonate (41) tubules (middle), and DCg PC (38) tubules (bottom). Solid trace is 0.0007 A-1 full width at half maximum instrument resolution. Reprinted with permission from Ref. 146. Copyright 2002 by the American Chemical Society.

In PB networks, the variation of the line shape as a function of the applied stress was interpreted in terms of a chain length distribution. Shorter chains may be more oriented than longer ones, at a given elongation [18], which may lead to a non-affine behaviour at the chain scale. The question of the spatial scale to which the deformation is affinely transmitted, has been investigated intensively by small angle neutron scattering [64]. However, it may happen as well that the chain portions close to junction points are more oriented (have a more restricted mobility) than those in the middle of the chains [19]. 

Figure 12 In-specular (bottom spectrum) and off-specular (middle and top) HREELS measurements for 0/Ag(21 0), recorded for the same electron energy and for the same scattering angle, 0S. The loss at 56meV has a remarkably strong impact scattering component which leads to an inversion of the intensity ration with the 40 meV loss for out-of-specular conditions.

A small angle X-ray scattering study showed that the middle phase films between flocculated oil droplets were about 90 nm in thickness, and spinning drop interfacial tension measurements were found to be able to centrifuge middle phase films off tne oil drops along the axis of rotation. 

Plate 3. Scattered calcite-cemented concretions in low angle-laminated beach to upper shoreface sandstones of the Middle Jurassic Valtos Formation at Valtos on Skye, Scotland. Scale is 1 m long. 

Fig. 8 A slight modification of the structure can lead to completely different properties, as is illustrated by methyl-substituted his-urea compound 14 that, in contrast to gelator 13. forms a typically weak gel. The oscillatory rheology experiment shows the weak gels characteristic frequency dependency of G and G" (right), and small-angle neutron scattering studies revealed that the molecular wires are only two molecules thick, as depicted in the tentative model in the middle. (Reproduced from Ref [38].)...

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