Formation of molecular hydrogen on amorphous silicate surfaces

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dc.creatorLi, Ling
dc.creatorManico, Giulio
dc.creatorCongiu, Emanuele
dc.creatorRoser, Joe
dc.creatorSwords, Sol
dc.creatorPerets, Hagai B.
dc.creatorLederhendler, Adina
dc.creatorBiham, Ofer
dc.creatorBrucato, John Robert
dc.creatorPirronello, Valerio
dc.creatorVidali, Gianfranco
dc.date2007-09-16
dc.date.accessioned2026-07-07T08:29:53Z
dc.date.available2026-07-07T08:29:53Z
dc.descriptionExperimental results on the formation of molecular hydrogen on amorphous silicate surfaces are presented and analyzed using a rate equation model. The energy barriers for the relevant diffusion and desorption processes are obtained. They turn out to be significantly higher than those obtained for polycrystalline silicates, demonstrating the importance of grain morphology. Using these barriers we evaluate the efficiency of molecular hydrogen formation on amorphous silicate grains under interstellar conditions. It is found that unlike polycrystalline silicates, amorphous silicate grains are efficient catalysts of H_2 formation in diffuse interstellar clouds.
dc.description5 pages, 2 figs. Proceedings of the international astrophysics and astrochemistry meeting in Paris (2007): Molecules in space & laboratory
dc.identifierhttps://arxiv.org/abs/0709.2472
dc.identifierhttp://arxiv.org/abs/0709.2472
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/138100
dc.subjectAstrophysics
dc.titleFormation of molecular hydrogen on amorphous silicate surfaces
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