Free Access

Fig. 2


Comparison between the analytic H2 formation efficiency using the formula from Cazaux & Tielens (2004) with the 2010 update (the binding energy for physisorbed H-atom EHp = 600 K, and the saddle point ES = EHpEpc = 200 K, with Epc being the activation energy to overcome to go from a physisorption site to a chemisorption site) and our numerical code for a zero-dimensional cloud model.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.