Fig. 2
Top panel: variation in the experimental sticking coefficient for D2 (•) and H2 (°) molecules on the silicate surface held at 10 K as a function of the beam temperature, ranging from 20 K to 340 K. The absolute uncertainties are equal to ±0.06; fits for D2 and H2 molecules with solid lines, obtained with formulae (1) using β (62°) = 2.22. Bottom panel: test of the model using the scaling law of Eq. (2). (°) H2 data as above, (•) D2 data transformed according to Eq. (2).
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