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1.3.6 Scattering Functions of Dielectric and Absorbing Irregular Particles

Published online by Cambridge University Press:  12 April 2016

R. Zerull
R. Zerull*
Affiliation:
Bereich Extraterrestrische Physik, Ruhr-UniversitätBochum, FRG

Extract

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Most model computations for the analysis of interplanetary dust are based on scattering functions of homogeneous spheres (Mie-theory). To investigate the influence of this restriction, scattering properties of nonspherical particles were studied by microwave analog experiments. The results of earlier investigations on dielectric rough spheres, cubes and octahedrons (Zerull, 1973; Zerull and Giese, 1974) may be shortly summarized as follows: Roughness (~ wavelength) does not significantly change the scattering behaviour of spheres, whereas cubes and octahedrons scatter evidently different than equivalent spheres. The dominant differences are increased intensity at medium scattering angles but no further increase towards backscattering, and nearly neutral polarization. These results encouraged to continue the investigations with really irregular particles of dielectric as well as absorbing material.

Type
1 Zodiacal Light
Information
International Astronomical Union Colloquium , Volume 31: Interplanetary Dust and Zodiacal Light , 1976 , pp. 130 - 134
Copyright
Copyright © Springer-Verlag 1976

References

Literature

Hodkinson, J.R.: Light Scattering and Extinction by Irregular Particles Larger than the Wavelength. Electromagnetic scattering (ed. Kerker, M.), Pergamon Press Oxford, London, New York, Paris, 1963.Google Scholar
Hulst, H.C. van de: Light scattering by small particles, John Wiley, New York, 1957.Google Scholar
Zerull, R.: Mikrowellenanalogieexperimente zur Lichtstreuung an Staubpartikeln, BMFT-FB W 73–18, 1973.Google Scholar
Zerull, R. und Giese, R.H.: Microwave Analog Studies. In: Planets, Stars and Nebulae studied with Photopolarimetry, University of Arizona Press, Tucson 1974.Google Scholar