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Fig. 9

MIR (4000−750 cm−1) FT-IR spectra of pure amorphous and crystalline (left and right panels, respectively) H2CO3 ices (solid black lines) at 20 and 80 K (top and bottom panels, respectively) compared to the same ices after 1 keV electron irradiation at different fluences with maximum fluence of 4.0 × 1016 e− cm−2.
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