Ketene formation in interstellar ICES: A laboratory study

Reggie L. Hudson; Mark J. Loeffler

doi:10.1088/0004-637X/773/2/109

Ketene formation in interstellar ICES: A laboratory study

Reggie L. Hudson, Mark J. Loeffler

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44 Scopus citations

Abstract

The formation of ketene (H₂CCO, ethenone) in polar and apolar ices was studied with in situ 0.8 MeV proton irradiation, far-UV photolysis, and infrared spectroscopic analyses at 10-20 K. Using isotopically enriched reagents, unequivocal evidence was obtained for ketene synthesis in H ₂O-rich and CO₂-rich ices, and several reaction products were identified. Results from scavenging experiments suggested that ketene was formed by free-radical pathways, as opposed to acid-base processes or redox reactions. Finally, we use our results to draw conclusions about the formation and stability of ketene in the interstellar medium.

Original language	English (US)
Article number	109
Journal	Astrophysical Journal
Volume	773
Issue number	2
DOIs	https://doi.org/10.1088/0004-637X/773/2/109
State	Published - Aug 20 2013
Externally published	Yes

Keywords

ISM: molecules
astrobiology
astrochemistry
molecular data
molecular processes

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1088/0004-637X/773/2/109

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title = "Ketene formation in interstellar ICES: A laboratory study",

abstract = "The formation of ketene (H2CCO, ethenone) in polar and apolar ices was studied with in situ 0.8 MeV proton irradiation, far-UV photolysis, and infrared spectroscopic analyses at 10-20 K. Using isotopically enriched reagents, unequivocal evidence was obtained for ketene synthesis in H 2O-rich and CO2-rich ices, and several reaction products were identified. Results from scavenging experiments suggested that ketene was formed by free-radical pathways, as opposed to acid-base processes or redox reactions. Finally, we use our results to draw conclusions about the formation and stability of ketene in the interstellar medium.",

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doi = "10.1088/0004-637X/773/2/109",

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TY - JOUR

T1 - Ketene formation in interstellar ICES

T2 - A laboratory study

AU - Hudson, Reggie L.

AU - Loeffler, Mark J.

PY - 2013/8/20

Y1 - 2013/8/20

N2 - The formation of ketene (H2CCO, ethenone) in polar and apolar ices was studied with in situ 0.8 MeV proton irradiation, far-UV photolysis, and infrared spectroscopic analyses at 10-20 K. Using isotopically enriched reagents, unequivocal evidence was obtained for ketene synthesis in H 2O-rich and CO2-rich ices, and several reaction products were identified. Results from scavenging experiments suggested that ketene was formed by free-radical pathways, as opposed to acid-base processes or redox reactions. Finally, we use our results to draw conclusions about the formation and stability of ketene in the interstellar medium.

AB - The formation of ketene (H2CCO, ethenone) in polar and apolar ices was studied with in situ 0.8 MeV proton irradiation, far-UV photolysis, and infrared spectroscopic analyses at 10-20 K. Using isotopically enriched reagents, unequivocal evidence was obtained for ketene synthesis in H 2O-rich and CO2-rich ices, and several reaction products were identified. Results from scavenging experiments suggested that ketene was formed by free-radical pathways, as opposed to acid-base processes or redox reactions. Finally, we use our results to draw conclusions about the formation and stability of ketene in the interstellar medium.

KW - ISM: molecules

KW - astrobiology

KW - astrochemistry

KW - molecular data

KW - molecular processes

UR - https://www.scopus.com/pages/publications/84881410986

UR - https://www.scopus.com/inward/citedby.url?scp=84881410986&partnerID=8YFLogxK

U2 - 10.1088/0004-637X/773/2/109

DO - 10.1088/0004-637X/773/2/109

M3 - Article

AN - SCOPUS:84881410986

SN - 0004-637X

VL - 773

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

M1 - 109

ER -

Ketene formation in interstellar ICES: A laboratory study

Abstract

Keywords

ASJC Scopus subject areas

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