SMALL-ANGLE NEUTRON-SCATTERING FROM SILICA PARTICLES IN SOLUTION WITHDIFFERENT CONCENTRATIONS

The effect of concentration of silica particles in hydrogenated soluti ons on the small-angle neutron scattering was investigated in the scat tering vector range between 6.3 x 10(-3) and 3.5 x 10(-1) Angstrom(-1) . The samples were prepared with volume concentrations from 0.3 up to 16.5%. The experimental data show interference of the scattered neutro ns, whose peak shifts towards higher Q values with increasing concentr ation. The form factor of the silica particle population was determine d and, from this, the structure factor was extracted, from which the e ffective reduced pair correlation functions for the silica particles c ould be evaluated. Ordering effects of silica particles at various con centration were studied in hydrogenated solutions by SANS.