Optical properties of solid and liquid sulfur at visible and infrared wavelengths |
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| Authors: | R Sasson R Wright ET Arakawa BN Khare Carl Sagan |
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| Institution: | Health and Safety Research Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA;Laboratory for Planetary Studies, Cornell University, Ithaca, New York 14853, USA |
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| Abstract: | Knowledge of the optical constants of elemental sulfur has potential applications to Venus, Jupiter, Io, Amalthea, and the Earth. The real part, n, of the index of refraction of liquid sulfur (at 133°C) and of solid orthorhombic sulfur (at 25°C) for the wavelength range 0.4–2.0 μm were measured ellipsometrically. The imaginary part, k, of the refractive index of liquid sulfur was obtained by transmittance measurements at the same temperature and wavelength range. The reflectance of semi-infinite slabs of solid and liquid sulfur is calculated using the measured n and k values. We confirm that sulfur melts on Io would be classified as “black” by the Voyager imaging system. |
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