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Table 1

Ion bombardment experiments with 200 keV H+ ions performed at INAF, Catania.

Experiment Type of C-sample Ices Max. fluence
No. ions cm-2

1 12C H2O 7.8 × 1015
2 13C H2O 9 × 1015
3a 13C O2 6.57 × 1015
3b 13C O2 1.65 × 1016
3c 13C O2 1.65 × 1016
3d 13C H2O 1.15 × 1016
3e 13C O2 1.65 × 1016

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