Binding Energy of Molecules on Water Ice: Laboratory Measurements and Modeling

  title={Binding Energy of Molecules on Water Ice: Laboratory Measurements and Modeling},
  author={Jiao Sheng He and Kinsuk Acharyya and Gianfranco Vidali},
  journal={arXiv: Instrumentation and Methods for Astrophysics},
  • J. He, K. Acharyya, G. Vidali
  • Published 7 March 2016
  • Physics, Materials Science
  • arXiv: Instrumentation and Methods for Astrophysics
We measured the binding energy of N$_2$, CO, O$_2$, CH$_4$, and CO$_2$ on non-porous (compact) amorphous solid water (np-ASW), of N$_2$ and CO on porous amorphous solid water (p-ASW), and of NH$_3$ on crystalline water ice. We were able to measure binding energies down to a fraction of 1\% of a layer, thus making these measurements more appropriate for astrochemistry than the existing values. We found that CO$_2$ forms clusters on np-ASW surface even at very low coverages. The binding energies… 
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