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Fig. 1


Representative IR spectrum taken after deposition at 15 K (blue) of the 1:24 13CH3OH:CO mixture and during the TPD at 100 K (red), showing the main IR features of CO and 13CH3OH. For the methanol CO stretch mode, the 13CO and CO peak (cut-off due to its high peak intensity) are visible. Between the two CO peaks an artefact, labelled int., is visible caused by the high intensity of the CO peak.

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