Abstract

The anomalous diffraction theory (ADT) that is originally introduced by van de Hulst (Light scattering by small particles, Wiley, New York, 1957), is often highly simplified so that the extinction and absorption efficiencies of randomly oriented particles are determined by the ratio of particle volume to the projected area. In this work, we compare the simplified ADT and the original one for randomly oriented particles with different shapes. Significant differences are found in both extinction and absorption efficiencies.

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