AAAR 32nd Annual Conference
September 30 - October 4, 2013
Oregon Convention Center
Portland, Oregon, USA
Abstract View
Q-Space Analysis of Scattering by Particles of Arbitrary Shape
CHRIS SORENSEN, William Heinson, Amit Chakrabarti, Evgenij Zubko, Kansas State University
Abstract Number: 224 Working Group: Aerosol Physics
Abstract Q-space analysis of light scattering by particles involves plotting the scattered intensity versus the scattering wave vector q on a double log plot. The analysis uncovers power law descriptions of the scattering for a wide range of particle morphologies including dielectric spheres of arbitrary size and refractive index (Mie scattering), fractal aggregates and irregularly shaped particles such as dusts. Conventional plotting versus the scattering angle yields non-descript and indistinguishable curves. Here we demonstrate the efficacy of the Q-space method for four different types of randomly and strongly perturbed spheres. DDA was used to calculate the scattered intensity as a function of the scattering angle for these perturbed spheres at three different refractive indices. Q-space analyses uncovered power laws and the powers were different than the Porod value of -4 obtained for the structure factor of the particles.