Optical Constants of Amorphous and Crystalline H_2O-ice: 2.5-22 μm (4000-455 cm^-1) Optical Constants of H_2O-ice

Publication

Reference: Mastrapa R. M., Sandford S. A., Roush T. L., Cruikshank D. P., Dalle Ore C. M. (2009). Optical Constants of Amorphous and Crystalline H$_2$O-ice: 2.5-22 μm (4000-455 cm$^{-1}$) Optical Constants of H$_2$O-ice. Astrophys. J., 701, 1347 - 1356.

Names

Title: Optical Constants of Amorphous and Crystalline H$_2$O-ice: 2.5-22 μm (4000-455 cm$^{-1}$) Optical Constants of H$_2$O-ice
Abstract: Using new laboratory spectra, we have calculated the real and imaginary parts of the index of refraction of amorphous and crystalline H$_2$O-ice from 20-150 K in the wavelength range 2.5-22 µm (4000-455 cm$^{-1}$) and joined these results with previous measurement from 1.25 to 2.5 µm. These optical constants improve on previous measurements by having better temperature and spectral resolution and can be used to create model spectra for comparison to spectra of solar system objects and interstellar materials. In this wavelength range, the infrared band shapes and positions of amorphous H$_2$O-ice are strongly dependent on deposition temperature. Amorphous and crystalline H$_2$O-ice have distinctive spectral bands at all wavelengths in this region with bands weakening and shifting to shorter wavelength in amorphous H$_2$O-ice compared to crystalline H$_2$O-ice. Some notable exceptions are the band near 6 µm, which is stronger in amorphous H$_2$O-ice, and the bands near 4.5 µm and 12.5 µm, which shift to longer wavelength in amorphous H$_2$O-ice.
Keywords: spectroscopy, transmission, optical constants spectra, band position, band integrated intensity, optical constants, mid-IR, molecular solid, ice Ih, H2O, temperature
Content: spectral data, band list data, experimental physics

Doi

10.1088/0004-637X/701/2/1347

Identifiers