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Title: A NEW SOURCE OF CO{sub 2} IN THE UNIVERSE: A PHOTOACTIVATED ELEY-RIDEAL SURFACE REACTION ON WATER ICES

Abstract

CO{sub 2} is one of the most abundant components of ices in the interstellar medium; however, its formation mechanism has not been clearly identified. Here we report an experimental observation of an Eley-Rideal-type reaction on a water ice surface, where CO gas molecules react by direct collisions with surface OH radicals, made by photodissociation of H{sub 2}O molecules, to produce CO{sub 2} ice on the surface. The discovery of this source of CO{sub 2} provides a new mechanism to explain the high relative abundance of CO{sub 2} ice in space.

Authors:
; ;  [1]
  1. Department of Chemistry, University of Virginia, Charlottesville, VA 22904 (United States)
Publication Date:
OSTI Identifier:
22365328
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal Letters; Journal Volume: 791; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASTROPHYSICS; CARBON DIOXIDE; CARBON MONOXIDE; DISSOCIATION; HYDROXYL RADICALS; INTERSTELLAR SPACE; MOLECULES; PHOTOLYSIS; SPACE; SURFACES; UNIVERSE; WATER

Citation Formats

Yuan, Chunqing, Cooke, Ilsa R., and Yates, John T. Jr., E-mail: jty2n@virginia.edu. A NEW SOURCE OF CO{sub 2} IN THE UNIVERSE: A PHOTOACTIVATED ELEY-RIDEAL SURFACE REACTION ON WATER ICES. United States: N. p., 2014. Web. doi:10.1088/2041-8205/791/2/L21.
Yuan, Chunqing, Cooke, Ilsa R., & Yates, John T. Jr., E-mail: jty2n@virginia.edu. A NEW SOURCE OF CO{sub 2} IN THE UNIVERSE: A PHOTOACTIVATED ELEY-RIDEAL SURFACE REACTION ON WATER ICES. United States. doi:10.1088/2041-8205/791/2/L21.
Yuan, Chunqing, Cooke, Ilsa R., and Yates, John T. Jr., E-mail: jty2n@virginia.edu. Wed . "A NEW SOURCE OF CO{sub 2} IN THE UNIVERSE: A PHOTOACTIVATED ELEY-RIDEAL SURFACE REACTION ON WATER ICES". United States. doi:10.1088/2041-8205/791/2/L21.
@article{osti_22365328,
title = {A NEW SOURCE OF CO{sub 2} IN THE UNIVERSE: A PHOTOACTIVATED ELEY-RIDEAL SURFACE REACTION ON WATER ICES},
author = {Yuan, Chunqing and Cooke, Ilsa R. and Yates, John T. Jr., E-mail: jty2n@virginia.edu},
abstractNote = {CO{sub 2} is one of the most abundant components of ices in the interstellar medium; however, its formation mechanism has not been clearly identified. Here we report an experimental observation of an Eley-Rideal-type reaction on a water ice surface, where CO gas molecules react by direct collisions with surface OH radicals, made by photodissociation of H{sub 2}O molecules, to produce CO{sub 2} ice on the surface. The discovery of this source of CO{sub 2} provides a new mechanism to explain the high relative abundance of CO{sub 2} ice in space.},
doi = {10.1088/2041-8205/791/2/L21},
journal = {Astrophysical Journal Letters},
number = 2,
volume = 791,
place = {United States},
year = {Wed Aug 20 00:00:00 EDT 2014},
month = {Wed Aug 20 00:00:00 EDT 2014}
}