Ultraviolet photon-induced synthesis and trapping of H2O 2 and O3 in porous water ice films in the presence of ambient O2: Implications for extraterrestrial ice

J. Shi, U. Raut, J. H. Kim, M. Loeffler, R. A. Baragiola

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

The mass uptake of ambient oxygen in nanoporous ice is enhanced by irradiation with 193 nm photons, due to conversion of O2 into H 2O2 and O3, with an efficiency that increases with decreasing temperature. These findings show a new way to form H 2O2 and O3 on icy surfaces in the outer solar system at depths much larger than are accessible by typical ionizing radiation, with possible astrobiological implications.

Original languageEnglish (US)
Article numberL3
JournalAstrophysical Journal Letters
Volume738
Issue number1
DOIs
StatePublished - Sep 1 2011
Externally publishedYes

Keywords

  • atomic processes
  • methods: laboratory
  • planets and satellites: atmospheres
  • planets and satellites: surfaces
  • radiation mechanisms: general

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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