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Gas Trapping in Ice and Its Release upon Warming

  • Akiva Bar-Nun
  • Diana Laufer
  • Oscar Rebolledo
  • Serguei Malyk
  • Hanna Reisler
  • Curt Wittig
Chapter
Part of the Astrophysics and Space Science Library book series (ASSL, volume 356)

Abstract

NASA’s Deep Impact was a turning point in our measurements of comet properties. For the first time we obtained direct measurements of the density, thermal inertia of the surface, and, most importantly, the tensile strength of the upper layers. The very small tensile strength of only 1–10 kPa (like that of Talcum powder) tells us that comet Tempel 1 is a loose agglomerate of fluffy ice particles (Bar-Nun et al. 2007). In what follows, we describe how gases are trapped in fluffy ice particles, how they are released from them when the temperature is increased, either by overall heating or by pulsed infrared laser irradiation and finally, what happens when deeper layers release their trapped gases when the heat wave penetrates inward. In addition, it will be shown that laboratory measurements can now be carried out that address fundamental transport issues such as the release of trapped gases in such ice environments and their transport through thin and thick ice layers.

Keywords

Heat Wave Stimulate Raman Scattering Ammonia Hydrate Amorphous Solid Water Small Tensile Strength 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

This work has been supported by the US- Israel Binational Science Foundation, BSF grant 2006339 and by the U.S. Army Research Office under grant number W911NF-07-1-0081.

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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • Akiva Bar-Nun
    • 1
  • Diana Laufer
    • 1
  • Oscar Rebolledo
    • 2
  • Serguei Malyk
    • 2
  • Hanna Reisler
    • 2
  • Curt Wittig
    • 2
  1. 1.Department of Geophysics and Planetary SciencesTel-Aviv UniversityTel-AvivIsrael
  2. 2.Department of ChemistryUniversity of Southern CaliforniaLos AngelesUSA

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