Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-12-09
Astrophys.J. 627 (2005) 850-860
Astronomy and Astrophysics
Astrophysics
20 pages, 3 tables and 10 figures. Accepted to ApJ. Minor changes made and adittional references added
Scientific paper
10.1086/430435
The results of experiments on the formation of molecular hydrogen on low density and high density amorphous ice surfaces are analyzed using a rate equation model. The activation energy barriers for the relevant diffusion and desorption processes are obtained. The more porous morphology of the low density ice gives rise to a broader spectrum of energy barriers compared to the high density ice. Inserting these parameters into the rate equation model under steady state conditions we evaluate the production rate of molecular hydrogen on ice-coated interstellar dust grains.
Biham Ofer
Manico Giulio
Perets Hagai B.
Pirronello Valerio
Roser Joe
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