Other
Scientific paper
Mar 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990natur.344..134k&link_type=abstract
Nature (ISSN 0028-0836), vol. 344, March 8, 1990, p. 134, 135.
Other
63
Amorphous Materials, Cubic Lattices, Ice Nuclei, Interstellar Matter, Phase Transformations, Ultraviolet Radiation, Diffraction Patterns, Temperature Dependence
Scientific paper
The effect of UV radiation on ice is studied using electron diffraction to follow the structural changes that occur. It is found that, below 70 K, UV irradiation transforms cubic ice into amorphous ice. This is a novel means of forming amorphous ice. It is inferred that other high-energy rays or particles will amorphize ice crystals below 70 K. It is concluded that crystalline ice in stellar atmospheres and on asteroids and planetary satellites will be rendered amorphous by UV radiation in times short compared to the timescale of stellar evolution.
Kouchi Akira
Kuroda Toshio
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