Journal
CHEMICAL PHYSICS LETTERS
Volume 404, Issue 1-3, Pages 187-191Publisher
ELSEVIER
DOI: 10.1016/j.cplett.2005.01.044
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Experimental studies of adsorption and desorption of molecular hydrogen on an amorphous porous solid water ice surface between 10 and 35 K reveal a very efficient isotopic segregation process. A statistical model, which take into account thermodynamic aspects of adsorption sites and isotopic competition, is proposed to understand the enhancement of deuterium fractionation. This mechanism could play a key role in chemistry at the surface of interstellar dust grains. (C) 2005 Elsevier B.V. All rights reserved.
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