Isotopic segregation of molecular hydrogen on water ice surface at low temperature
作者： F. Dulieu , L. Amiaud , S. Baouche , A. Momeni , J.-H. Fillion
DOI: 10.1016/J.CPLETT.2005.01.044
关键词: Cosmic dust 、 Amorphous solid 、 Fractionation 、 Adsorption 、 Hydrogen molecule 、 Deuterium 、 Chemistry 、 Porosity 、 Thermodynamics 、 Desorption
摘要: Experimental studies of adsorption and desorption molecular hydrogen on an amorphous porous solid water ice surface between 10 35 K reveal a very efficient isotopic segregation process. A statistical model, which take into account thermodynamic aspects sites competition, is proposed to understand the enhancement deuterium fractionation. This mechanism could play key role in chemistry at interstellar dust grains.
core.ac.uk
harvard.edu
elsevier.com
sci-hub.se 参考文章(21)
Eric Herbst, Isotopic Fractionation by Ion-Molecule Reactions Space Science Reviews. ,vol. 106, pp. 293- 304 ,(2003) , 10.1007/978-94-010-0145-8_19
Akihiro Nagaoka, Naoki Watanabe, Akira Kouchi, Efficient Formation of Deuterated Methanol by H‐D Substitution on Interstellar Grain Surfaces ASTROCHEMISTRY: From Laboratory Studies to Astronomical Observations. ,vol. 855, pp. 69- 75 ,(2006) , 10.1063/1.2359541
Ying Guo, Xibin Gu, Fangtong Zhang, Alexander M. Mebel, Ralf I. Kaiser, Reaction Dynamics of Small Carbon Clusters with Unsaturated Hydrocarbons in the Interstellar Medium ASTROCHEMISTRY: From Laboratory Studies to Astronomical Observations. ,vol. 855, pp. 42- 52 ,(2006) , 10.1063/1.2359538
Yi-nan Chin, Ralf I. Kaiser, Claudia Lemme, Christian Henkel, Detection of Interstellar Cyanoallene and its Implications for Astrochemistry ASTROCHEMISTRY: From Laboratory Studies to Astronomical Observations. ,vol. 855, pp. 149- 153 ,(2006) , 10.1063/1.2359550
Kip P Stevenson, Greg A Kimmel, Zdenek Dohnalek, R Scott Smith, Bruce D Kay, Controlling the Morphology of Amorphous Solid Water Science. ,vol. 283, pp. 1505- 1507 ,(1999) , 10.1126/SCIENCE.283.5407.1505
Liv Hornekær, A Baurichter, VV Petrunin, David Field, AC Luntz, Importance of Surface Morphology in Interstellar H2 Formation Science. ,vol. 302, pp. 1943- 1946 ,(2003) , 10.1126/SCIENCE.1090820
T. R. Govers, L. Mattera, G. Scoles, Molecular beam experiments on the sticking and accommodation of molecular hydrogen on a low‐temperature substrate Journal of Chemical Physics. ,vol. 72, pp. 5446- 5455 ,(1980) , 10.1063/1.439013
David Hollenbach, E. E. Salpeter, Surface recombination of hydrogen molecules The Astrophysical Journal. ,vol. 163, pp. 155- ,(1971) , 10.1086/150754
J. E. Roser, G. Manico, V. Pirronello, G. Vidali, Formation of Molecular Hydrogen on Amorphous Water Ice: Influence of Morphology and Ultraviolet Exposure The Astrophysical Journal. ,vol. 581, pp. 276- 284 ,(2002) , 10.1086/344200
Nadia Balucani, Piergiorgio Casavecchia, Gas-phase reactions in extraterrestrial environments: laboratory investigations by crossed molecular beams. Origins of Life and Evolution of Biospheres. ,vol. 36, pp. 443- 450 ,(2007) , 10.1007/S11084-006-9049-Y