کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5430437 | 1508712 | 2008 | 12 صفحه PDF | دانلود رایگان |

We use the discrete dipole approximation (DDA) to perform electromagnetic scattering calculations of particles in a 3D volume. We adjust the spacing between the particles to change the volume densities of the scattering systems from approximately 10% to 100%. For very large volume densities, e.g. >50%, it is difficult to assign unambiguously whether the system is composed of a single heterogeneous particle or of multiple particles. Our calculations demonstrate optical effects attributable to multiple scattering in systems having volume densities as high as â¼90%. This suggests that heterogeneities within naturally occurring particle systems can produce multiple-scattering effects. We also see evidence of very deep negative polarization branches (NPBs) (â¼â6%) that may have implications in interpreting polarization phase curves of cometary circumnuclear halos.
Journal: Journal of Quantitative Spectroscopy and Radiative Transfer - Volume 109, Issues 12â13, AugustâSeptember 2008, Pages 2195-2206