Measurement of the kinetic energy of hydrogen molecules desorbing from amorphous water ice

J. E. Roser; S. Swords; G. Vidali; G. Manicò; V. Pirronello

doi:10.1086/379095

Measurement of the kinetic energy of hydrogen molecules desorbing from amorphous water ice

J. E. Roser, S. Swords, G. Vidali, G. Manicò, V. Pirronello

Department of Physics

Research output: Contribution to journal › Article › peer-review

43 Scopus citations

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.

Original language	English (US)
Pages (from-to)	L55-L58
Journal	Astrophysical Journal
Volume	596
Issue number	1 II
DOIs	https://doi.org/10.1086/379095
State	Published - Oct 10 2003

Keywords

Astrochemistry
Dust, extinction
ISM: molecules
Methods: laboratory
Molecular processes

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/379095

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title = "Measurement of the kinetic energy of hydrogen molecules desorbing from amorphous water ice",

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.",

keywords = "Astrochemistry, Dust, extinction, ISM: molecules, Methods: laboratory, Molecular processes",

author = "Roser, {J. E.} and S. Swords and G. Vidali and G. Manic{\`o} and V. Pirronello",

note = "Funding Information: We acknowledge financial support from NASA through Funding Information: grants NAG5-6822 and NAG5-9093 to G. V. V. P. acknowledges support from the Italian Ministry for University and Scientific Research and from the Italian Space Agency. We thank Robert D{\textquoteright}Agostino, Chris Nagele, Scott Barbarow, Heather Gangemi, and Emily Watkins of Syracuse University for technical assistance in the laboratory.",

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T1 - Measurement of the kinetic energy of hydrogen molecules desorbing from amorphous water ice

AU - Roser, J. E.

AU - Swords, S.

AU - Vidali, G.

AU - Manicò, G.

AU - Pirronello, V.

N1 - Funding Information: We acknowledge financial support from NASA through Funding Information: grants NAG5-6822 and NAG5-9093 to G. V. V. P. acknowledges support from the Italian Ministry for University and Scientific Research and from the Italian Space Agency. We thank Robert D’Agostino, Chris Nagele, Scott Barbarow, Heather Gangemi, and Emily Watkins of Syracuse University for technical assistance in the laboratory.

PY - 2003/10/10

Y1 - 2003/10/10

N2 - 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.

AB - 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.

KW - Astrochemistry

KW - Dust, extinction

KW - ISM: molecules

KW - Methods: laboratory

KW - Molecular processes

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JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 II

ER -

Measurement of the kinetic energy of hydrogen molecules desorbing from amorphous water ice

Abstract

Keywords

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