Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975ap%26ss..34..123l&link_type=abstract
(Symposium on Solid State Astrophysics, Cardiff, Wales, July 9-12, 1974.) Astrophysics and Space Science, vol. 34, Apr. 1975, p.
Astronomy and Astrophysics
Astrophysics
14
Adsorption, Gas-Solid Interfaces, Hydrogen Recombinations, Interstellar Matter, Surface Reactions, Astrophysics, Carbon Dioxide, Carbon Monoxide, Critical Temperature, Desorption, Mathematical Models, Physical Properties, Reaction Kinetics
Scientific paper
The physical adsorption energy, E, of hydrogen molecules on various substrates at temperatures between 5 and 30 K and at the lowest practicable gas densities has been measured. Values of E/k are for condensed CO 340 K, CO2 800 K, H2O 850 K and for 'dirty' graphite 980 and 'dirty' copper 800 K. From these measurements temperature ranges in which H atoms might combine on the surface to form H2 molecules are estimated. Duley has discussed the formation and composition of condensed gas mantles on interstellar grains. The effects of such mantles in promoting and poisoning hydrogen molecule formation are discussed.-
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