Fig. 5
Relative abundances of all observed COMs in the 200 keV H+ radiolysis of C2H2:H2O mixed ice over H+ fluence of 6.0 × 1014 protons cm−2 (i.e., ~ 16.4 eV 16u-molecule−1). (a) Relative abundances of vinyl alcohol over the total yields of ketene, acetaldehyde, and ethanol. (b) Relative abundances of ketene over acetaldehyde and ethanol over acetaldehyde. The dashed line shows the turning point of product’s formation behavior. The data points are connected by solid lines for clarity.
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