Optical properties of NH_3 ice from the far infrared to the near ultraviolet

The optical constants (nr,ni) for solid ammonia in the cubic phase from 50 to 71,000 cm−1 (0.14–200 μm) are displayed in both graphical and tabular form. The refractive indices nr were obtained from previously published spectra of the absorption index ni by means of the Kramers-Kronig dispersion relation. Mie scattering parameters in the same spectral range are graphically illustrated for particle sizes from 1 to 100 μm. An application of these results to the atmosphere of the planet Jupiter is also presented.