Statistics – Applications
Scientific paper
May 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005elsn.conf..313v&link_type=abstract
In: 8th Conference on Electromagnetic and Light Scattering by Nonspherical Particles: Theory, Measurements and Applications, Ed
Statistics
Applications
Polarization, Aggregates
Scientific paper
We present measurements of three scattering matrix elements as functions of the scattering angle, namely F11(θ), -F12(θ)/F11(θ), and F22(θ)/F11(θ), at a wavelength of 632.8 nm, for a sample of fluffy aggregates in random orientations. The aggregates are composed of coagulated magnesiosilicate grains. The (monomer) grains have diameters of the order of a few tens of nanometers. Most striking about the measured results is the extremely high degree of linear polarization for incident unpolarized light -F12(θ)/F11(θ), with a maximum of about 80%. This value is much higher than the values between 10% and 20% typical for micron-sized irregular compact silicate particles. In contrast, the phase function F11(θ) shows a behavior that is very similar to the behavior of micron-sized irregular compact particles. For the F22(θ)/F11(θ) functions we see again that the fluffy aggregates show a behavior that lies in a different domain (minimum about 80%) than the irregular compact particles (minima typically around about 30%).
Hovenier J.
Munoz Olga
Nuth Joe
Rietmeijer Frans
Volten Hester
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