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Fig. 9

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H2S on the surface after deposition at 8 K (top left) and during TPD at 50 K (top middle), at 100 K (top right), and at 150 K (bottom left).The bottom right panel also shows the surface at 150 K, but the chains are highlighted with one color per chain. In these simulations the molecules in the ice do shield each other and photons cannot dissociate molecules if they are under another molecule. The deposition rate of H2S is 1 ML s−1; the heating ramp is 1 K min−1 and G0 = 5 × 106.

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