New Optical Constants of Amorphous and Crystalline H2O-ice, 3-20 μm

Details New Optical Constants of Amorphous and Crystalline H2O-ice, 3-20 μm New Optical Constants of Amorphous and Crystalline H2O-ice, 3-20 μm

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008dps....40.5403m&link_type=abstract

American Astronomical Society, DPS meeting #40, #54.03; Bulletin of the American Astronomical Society, Vol. 40, p.496

Physics

Geophysics

1

Scientific paper

We will present new optical constants of amorphous and crystalline H2O-ice in the spectral range 3-20 μm. Our new measurements provide high temperature resolution for crystalline H2O-ice, 10 K intervals from 20-150 K, including temperatures relevant to Solar System objects. We have found that the shape of the 3 μm feature in amorphous H2O-ice is strongly dependant on deposition temperature and that the high and low density phases of amorphous H2O-ice are not easily distinguishable. We will present methods of measuring the change in band shape with phase and temperature. We acknowledge financial support from the NASA Origins of the Solar System Program and the NASA Planetary Geology and Geophysics Program.

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