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Measurement of the Kinetic Energy of Hydrogen Molecules Desorbing from Amorphous Water Ice

descriptionPublicationkeyboard_double_arrow_right Article , Journal 15 Sep 2003 Italy Publisher:American Astronomical SocietyJournal:The Astrophysical Journal, volume 596, pages L55-L58 (issn: 0004-637X, eissn: 1538-4357,

Authors: Roser JE; Swords S; Vidali G; MANICO', Giulio; PIRRONELLO, Valerio;

doi: 10.1086/379095

handle: 20.500.11769/31331

Measurement of the Kinetic Energy of Hydrogen Molecules Desorbing from Amorphous Water Ice

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Abstract

A hydrogen molecule that is formed on an interstellar grain might retain some of the 4.48 eV of energy that is released in the recombination reaction of two hydrogen atoms. We set up an experiment to measure the translational (kinetic) energy of hydrogen molecules after they are formed on and are ejected from the surface of an interstellar dust grain analog. Here we report the first measurements of the kinetic energy of molecular deuterium as it leaves the surface of an amorphous water sample. The astrophysical implications of such measurements are discussed.

Country

Italy

Related Organizations

National Institute for Nuclear Physics
Italy
Syracuse University
United States
University of Catania
Italy
Syracuse University
United States
Università degli studi di Salerno
Italy

Keywords

Space and Planetary Science, Astronomy and Astrophysics, Energy Research

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