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Temperature Dependence of the Mie Scattering and Absorption Cross Sections for Aluminum Oxide

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Abstract

The temperature dependence of the scattering and absorption cross sections for electromagnetic radiation incident upon spherical particles of aluminum oxide is calculated from the Mie theory for a temperature range from 1200°C to 2020°C.The calculations are based on the recent measurements of the absorption coefficient by Gryvnak and Burch. The results are given for particle radii from 0.1 μ to 10 μ and a range of wavelengths from 0.5 μ to 6 μ. At a wavelength of 2 μ the efficiency factor for absorption increases by a factor of 40 as the temperature increases from 1200°C to 2020°C.

© 1965 Optical Society of America

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