Abstract

The optical constants n r + in i of liquid methane and phase I solid methane were determined over the entire spectral range by the use of various data sources published in the literature. Kramers–Kronig analyses were performed on the absorption spectra of liquid methane at the boiling point (111 K) and the melting point (90 K) and on the absorption spectra of phase I solid methane at the melting point and at 30 K. Measurements of the static dielectric constant at these temperatures and refractive indices determined over limited spectral ranges were used as constraints in the analyses. Applications of methane optical properties to studies of outer solar system bodies are described.

© 1994 Optical Society of America

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