The results of multiple small-angle neutron scattering (SANS) experime
nts carried out using a low-resolution instrument on two bidisperse Al
2O3 samples, with particle sizes much larger than the limit accessible
under the single-scattering approximation, have been analyzed in the
light of a recently developed formalism for multiple small-angle scatt
ering. It is shown that the extraction of realistic structural paramet
ers that are in good agreement with those calculated from prior knowle
dge of the samples is only possible when both multiple scattering and
bidispersity of the samples have been accounted for.