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Temperature-dependent Formation of Ozone in Solid Oxygen by 5 keV Electron Irradiation and Implications for Solar System Ices

Sivaraman, Bhalamurugan; Jamieson, Corey S.; Mason, Nigel J. and Kaiser, Ralf I. (2007). Temperature-dependent Formation of Ozone in Solid Oxygen by 5 keV Electron Irradiation and Implications for Solar System Ices. Astrophysical Journal, 669 pp. 1414–1421.

URL: http://www.journals.uchicago.edu/doi/abs/10.1086/5...
DOI (Digital Object Identifier) Link: http://dx.doi.org/10.1086/521216
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Abstract

We have investigated the formation of ozone by electron impact in solid molecular oxygen ices between 11 and 30 K. The amount of ozone formed is shown to be strongly dependent on the sample temperature. As the ice temperature increases, the column density of the ozone monomer is found to diminish. This is ascribed to the loss of oxygen atoms by recombination with a neighboring oxygen atom to “recycle” molecular oxygen. In the “warm-up” phase after irradiation, two additional temperature-dependent reaction mechanisms were observed to synthesize ozone: (1) a reaction of oxygen atoms from a [O3…O] complex with a neighboring oxygen molecule and (2) a reaction of trapped oxygen atoms with oxygen molecules to yield the ozone monomer. These experiments have important implications to the oxygen chemistry in icy satellites throughout our solar system.

Item Type: Journal Article
ISSN: 1538-4357
Keywords: astrochemistry; ISM: molecules; methods: laboratory; molecular processes; planets and satellites: general
Academic Unit/Department: Science > Physical Sciences
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
eSTEeM
Item ID: 10777
Depositing User: Astrid Peterkin
Date Deposited: 29 May 2008
Last Modified: 05 Mar 2014 10:29
URI: http://oro.open.ac.uk/id/eprint/10777
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