Fig. 6

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Zoom-in into the CH stretching vibration modes region for the RAIR difference spectrum obtained after hydrogenation of UV-exposed C2H2 ice (green line). See the right panel of Fig. 5 for more details. The spectrum of pure C2H6 ice at 20 K is adapted from Öberg et al. (2009) (black dots). The spectrum of pure C4H10 at 10 K is obtained by Strazzulla & Baratta (1992) (blue line). All spectra are offset for clarity.
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