Author/Authors :
Dulieu، نويسنده , , F. and Amiaud، نويسنده , , L. and Baouche، نويسنده , , S. H. Momeni-Masuleh and T. N. Phillips، نويسنده , , A. and Fillion، نويسنده , , J.-H. and Lemaire، نويسنده , , J.L.، نويسنده ,
Abstract :
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.
