Scattered intensity experiments

Figure C2.10.1. Potential dependence of the scattering intensity of tire (1,0) reflection measured in situ from Ag (100)/0.05 M NaBr after a background correction (dots). The solid line represents tire fit of tire experimental data witli a two dimensional Ising model witli a critical exponent of 1/8. Model stmctures derived from tire experiments are depicted in tire insets for potentials below (left) and above (right) tire critical potential (from [15]).

In an X-ray crystallography experiment the instantaneous scattered intensity is given by... 

As emphasized earlier, the weakness of the difference intensity is a specific difficulty of this sort of experiments. The ratio between the difference and the full scattering intensity is on the order of This is particularly problematic... 

TK. The figure is taken with nermJJ r exPeri ntal (+) X-ray scattering intensities... 

The whole object of performing an X-ray scattering experiment is to be able to deduce the microscopic strains from the scattered intensity. However, except in a... 

Solutions at concentration Cq = 0.5j 1.2 and 1.6 10 g cm were prepared under vigorous stirring at 150°C and then cooled down at 23 C. It was checked by NMR and infrared experiments that no alteration nor chemical modification had occured (1+). After quenching, the intensity scattered by the solutions was recorded as a function of time. After approximately 36 h, no variation was detected for the sample Cq = 0.5 10 g cm 3 while a slow linear increase of scattered intensity with time was detected for the two other samples. In this study, the solutions were allowed to stay at room temperature for three days and then diluted at the concentration C = 10 g cm . ... 

As emphasized earlier, the weakness of the difference intensity is a specific difficulty with this sort of experiment. The ratio between the difference and the full scattering intensity is on the order of 10 -10 This is particularly problematic in solution work, where the radiation scattered by the solute is buried in that from the solvent. A further complication arises from the interference between X-ray and optical manipulations. In fact, the intensity of... 

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