Fig. 1
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Left: QMS-TPD spectra in the range from 50 to 225 K for the selected m/z values obtained after the UV-exposure of 10 ML of pure HCCH ice with 4.6 × 1016 photons cm−2 at 10 K. Right: QMS-TPD spectrum obtained after the hydrogenation of UV-exposed ice with 1.3 × 1017 cm−2 atoms at 10 K. The ordinate axis is presented as a logarithm of 10. An exponential decay of ion intensity appears as a straight line.
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