Author/Authors :
Mastrapa، R. M. E. نويسنده , , R.M. and Bernstein، نويسنده , , M.P. and Sandford، نويسنده , , S.A. and Roush، نويسنده , , T.L. and Cruikshank، نويسنده , , D.P. and Ore، نويسنده , , C.M. Dalle، نويسنده ,
Abstract :
Using new laboratory spectra, we have calculated the real and imaginary parts of the index of refraction of amorphous and crystalline H2O-ice from 20 to 150 K in the frequency range 9000–3800 cm−1 (1.1–2.6 μm) at a spectral resolution of 1 cm−1. These optical constants can be used to create model spectra for comparison to spectra from Solar System objects. We also analyzed the differences between the amorphous and crystalline H2O-ice spectra, including weakening of bands and shifting of bands to shorter wavelength in amorphous H2O-ice spectra. We have also observed two spectrally distinct phases of amorphous H2O-ice.
