Laboratory measurements of infrared absorption spectra of hydrogen-ordered ICE: A step to the exploration of ICE XI in space

M. Arakawa, H. Kagi, H. Fukazawa

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18 Citations (Scopus)

Abstract

Infrared absorption spectra of ice were obtained at 4, 60, 100, 140, 160, and 240 K to make spectroscopic observations of hydrogen ordering at low temperatures. A broad peak observed at around 850 cm-1 (11.7 μm) was derived from libration of water molecules. The peak width was notably narrower at temperatures less than 140 K. A decrease in the peak width occurring in accordance with the formation of ice with ordered arrangements of hydrogen atoms was suggested from incoherent inelastic neutron-scattering studies. These results are consistent with ordering of hydrogen atoms. The existence of hydrogen-ordered ice in space is the subject of continuing astronomical debate. Our results demonstrate that ordered ice in space is detectable using infrared telescopes and planetary exploration.

Original languageEnglish
Pages (from-to)361-365
Number of pages5
JournalAstrophysical Journal, Supplement Series
Volume184
Issue number2
DOIs
Publication statusPublished - 2009

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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