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Fig. 2


RAIR difference spectra from a co-deposition of H and 16O2 from Cuppen et al. (2010), H2, CO2 and 18O (experiment 1), CO2 and 18O (experiment 2). Spectra are baseline corrected and offset for clarity. The spectra corresponding to experiments 1, 2 and 5 are scaled with a factor 3. Note that the multitude of peaks in the right panel for experiments 1 and 2 are due to water vapor in the setup, and the peaks at 3515 and 3564 cm-1 are also visible in a “pure” CO2 spectrum.

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