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Table 2

X-ray photodesorption yields in molecules desorbed per incident photon (in 10−4 molecules photon−1) of CH3CN, HCN, CH4, and CH3 at 560 eV from mixed 13CO:CH3CN and H2O:CH3CN ices irradiated at 15 K.

Species CO:CH3CN−7:1 H2O:CH3CN−10:1
CH3CN 4.3 ± 1.2 <1
HCN 8.3 ± 2.1 3.1 ± 2.1
CH4 <2 6.8 ± 2.7
CH3 3.9 ± 2.3 <2

Notes. The fluence received by the ice before the measurements is <2 × 1016 photons cm−2

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