Ozone production in electron irradiated CO<sub>2</sub>:O<sub>2</sub> ices

Mifsud, Duncan V.; Kaňuchová, Z.; Ioppolo, Sergio; Herczku, Péter; Muiña, Alejandra Traspas; Sulik, B.; Rahul, K. K.; Kovács, Sándor; Hailey, Perry A.; McCullough, Robert; Mason, Nigel J.; Juhász, Zoltán

doi:10.1039/d2cp01535h

Cited by 5 publications

(3 citation statements)

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“…One striking difference is the size of the absorption band due to the asymmetric stretching mode of O 3 located at about 1,041 cm −1 (Chaabouni et al., 2000). In the 20 K spectrum (Figure 2), this band is very intense and is indicative of the efficient formation of O 3 in the irradiated CO 2 ice (Mifsud et al., 2022a, 2022b). In the 70 K spectrum (Figure 3), however, this band is significantly smaller, suggesting an inefficient O 3 formation pathway.…”

Section: Resultsmentioning

confidence: 99%

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Sulfur Ion Implantations Into Condensed CO₂: Implications for Europa

Mifsud

Kaňuchová

Herczku

et al. 2022

Geophysical Research Letters

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The ubiquity of sulphur ions within the Jovian magnetosphere has led to suggestions that the implantation of these ions into the surface of Europa may lead to the formation of SO2. However, previous studies on the implantation of sulphur ions into H2O ice (the dominant species on the Europan surface) have failed to detect SO2 formation. Other studies concerned with similar implantations into CO2 ice, which is also known to exist on Europa, have offered seemingly conflicting results. In this letter, we describe the results of a study on the implantation of 290 keV S + ions into condensed CO2 at 20 and 70 K. Our results demonstrate that SO2 is observed after implantation at 20 K, but not at the Europa-relevant temperature of 70 K. We conclude that this process is likely not a reasonable mechanism for SO2 formation on Europa, and that other mechanisms should be explored instead.

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Section: Resultsmentioning

confidence: 99%

“…The raw spectroscopic data collected during experimentation is available on the Mendeley Data online repository: https://doi.org/10.17632/zr2mdbk5dt.1 (Mifsud et al., 2022c). Data analysis was performed using the OriginPro 2018 software: https://www.originlab.com/.…”

Section: Data Availability Statementmentioning

confidence: 99%

Sulfur Ion Implantations Into Condensed CO₂: Implications for Europa

Mifsud

Kaňuchová

Herczku

et al. 2022

Geophysical Research Letters

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show abstract

“…To this end, our research group has been active in characterising the mid-infrared spectra of various molecular ices relevant to astrochemistry, including CO 2 6,7 and O 3 . 8 In this paper, we build upon our previous work and present a thorough and systematic mid-infrared characterisation of pure SO 2 ice deposited at various cryogenic temperatures and thermally annealed to sublimation. The need for more spectroscopic data on sulphur-bearing astrophysical ice analogues was highlighted in a recent review, 9 and is reflective of our comparatively incomplete understanding of sulphur ice astrochemistry, particularly as it relates to solid SO 2 .…”

Section: Introductionmentioning

confidence: 99%