Ozone Production in Electron Irradiated CO2:O2 Ices
arXiv:2207.10453 · doi:10.1039/D2CP01535H
Abstract
The detection of ozone (O3) in the surface ices of Ganymede, Jupiters largest moon, and of the Saturnian moons Rhea and Dione, has motivated several studies on the route of formation of this species. Previous studies have successfully quantified trends in the production of O3 as a result of the irradiation of pure molecular ices using ultraviolet photons and charged particles (i.e., ions and electrons), such as the abundances of O3 formed after irradiation at different temperatures or using different charged particles. In this study, we extend such results by quantifying the abundance of O3 as a result of the 1 keV electron irradiation of a series of 14 stoichiometrically distinct CO2:O2 astrophysical ice analogues at 20 K. By using mid-infrared spectroscopy as our primary analytical tool, we have also been able to perform a spectral analysis of the asymmetric stretching mode of solid O3 and the variation in its observed shape and profile among the investigated ice mixtures. Our results are important in the context of better understanding the surface composition and chemistry of icy outer Solar System objects, and may thus be of use to future interplanetary space missions such as the ESA Jupiter Icy Moons Explorer and the NASA Europa Clipper missions, as well as the recently launched NASA James Webb Space Telescope.
arXiv commentAccepted for publication in Phys. Chem. Chem. Phys
References in corpus (14)
- The James Webb Space Telescope
- Surface Compositions Across Pluto and Charon
- Laboratory evidence for efficient water formation in interstellar ices
- The Surface Distributions of the Production of the Major Volatile Species, H2O, CO2, CO and O2, from the Nucleus of Comet 67P/Churyumov-Gerasimenko throughout the Rosetta Mission as Measured by the ROSINA Double Focusing Mass Spectrometer
- Surface localization of gas sources on comet 67P/Churyumov-Gerasimenko based on DFMS/COPS data
- Molecular Oxygen in Oort Cloud Comet 1P/Halley
- Distribution of CO2 ice on the large moons of Uranus and evidence for compositional stratification of their near-surfaces
- Thermal and energetic processing of astrophysical ice analogues rich in SO
- Electron Irradiation and Thermal Chemistry Studies of Interstellar and Planetary Ice Analogues at the ICA Astrochemistry Facility
- The Ice Chamber for Astrophysics-Astrochemistry (ICA): A New Experimental Facility for Ion Impact Studies of Astrophysical Ice Analogues
- Vacuum ultraviolet photoabsorption spectroscopy of space-related ices: 1 keV electron irradiation of nitrogen- and oxygen-rich ices
- Thermal properties of Rhea's Poles: Evidence for a Meter-Deep Unconsolidated Subsurface Layer
- Mid-IR and VUV Spectroscopic Characterisation of Thermally Processed and Electron Irradiated CO2 Astrophysical Ice Analogues
- Photolysis of pure solid O3 and O2 films at 193 nm