Neutron Scattering - JUWEL - Forschungszentrum Jülich
Neutron Scattering - JUWEL - Forschungszentrum Jülich
Neutron Scattering - JUWEL - Forschungszentrum Jülich
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6 Vitaliy Pipich<br />
extract information about minimum of the forward scattering, and plot it as function of D2O<br />
content.<br />
Figure 3. Forward scattering as a function of �D2O and �.<br />
Figure 4: Expected results. (Left) the scattering signal in case of �D2O=0.04 and 0.76. In<br />
the amplified inset is the small angle part of the calculated scattering curves. In case of<br />
�D2O=0.04 there is clear suppression of the forward scattering due to the hard sphere<br />
interactions. Calculated scattering curve in case of the sample with �D2O= 0.76 shows no<br />
interaction term. Red curve is pure form factor of PS spheres without taking into account<br />
instrumental resolution function. (Right) Ration between �D2O=0.04 and �D2O=0.76 is<br />
plotted here. So the forward scattering and form factor of both sample are the same, and<br />
in case of �D2O=0.76 sample S(Q) =1, therefore this ratio is the structure factor of<br />
�D2O=0.04 sample.<br />
Next step is the investigation PS spheres in case of sample with D2O content 76% [PS content<br />
0.25%]. This point is located at the local maximum (see Figure 3). At this level of the dilution<br />
the structure factor is definitely undetectable. Please read carefully caption of Figure 4 to<br />
understand the logic of planned experiment.