Neutron scattering from aerosols: intraparticle structure factor, guinier analysis of particle speed, and crossed beam kinematics
A theoretical formalism for neutron scattering from systems of particles is applied to liquid nanodroplet aerosols. A term arising from intraparticle, intermolecular correlations is identified. The kinematical theory of two body scattering is recast into a form convenient for interpreting the results of experiments with crossed beams of neutrons and aerosol particles. Based on a theoretical analysis of the scattered intensity in the Guinier region, a method for determining the particle velocity directly from the experimental data is outlined. The method is not restricted by assumptions about particle shape, composition, uniformity, or size distribution.
Wilemski
G
Department of Physics and Cloud and Aerosol Sciences Laboratory, University of Missouri-Rolla, Rolla, Missouri 65409, USA.