Formation of formaldehyde and carbon dioxide on an ICY grain analog using fast hydrogen atoms

S. M. Madzunkov; J. A. MacAskill; A. Chutjian; P. Ehrenfreund; M. R. Darrach; G. Vidali; B. J. Shortt

doi:10.1088/0004-637X/697/1/801

Formation of formaldehyde and carbon dioxide on an ICY grain analog using fast hydrogen atoms

S. M. Madzunkov, J. A. MacAskill, A. Chutjian, P. Ehrenfreund, M. R. Darrach, G. Vidali, B. J. Shortt

Department of Physics

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

12 Scopus citations

Abstract

Formaldehyde (H₂CO) and carbon dioxide (CO₂) were produced in collisions of a superthermal, 3 eV beam of H(²S) atoms with CO molecules adsorbed on a gold surface at 4.8 K. The reaction-generated products were detected and analyzed using the techniques of temperature programmed desorption (TPD), quadrupole mass spectrometry, and a novel application of the Metropolis algorithm, random-walk procedure to identify the unique fractionation patterns of H₂CO and CO₂ from the patterns of other species such as N₂, CO, and H₂O embedded in the CO blanket and devolved in the TPD/mass spectrometry process. Reaction sequences are given to account for the formation of H₂CO and CO ₂.

Original language	English (US)
Pages (from-to)	801-806
Number of pages	6
Journal	Astrophysical Journal
Volume	697
Issue number	1
DOIs	https://doi.org/10.1088/0004-637X/697/1/801
State	Published - 2009

Keywords

Circumstellar matter
ISM: molecules
Stars: winds, outflows
Words: astrochemistry

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1088/0004-637X/697/1/801

Cite this

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title = "Formation of formaldehyde and carbon dioxide on an ICY grain analog using fast hydrogen atoms",

abstract = "Formaldehyde (H2CO) and carbon dioxide (CO2) were produced in collisions of a superthermal, 3 eV beam of H(2S) atoms with CO molecules adsorbed on a gold surface at 4.8 K. The reaction-generated products were detected and analyzed using the techniques of temperature programmed desorption (TPD), quadrupole mass spectrometry, and a novel application of the Metropolis algorithm, random-walk procedure to identify the unique fractionation patterns of H2CO and CO2 from the patterns of other species such as N2, CO, and H2O embedded in the CO blanket and devolved in the TPD/mass spectrometry process. Reaction sequences are given to account for the formation of H2CO and CO 2.",

keywords = "Circumstellar matter, ISM: molecules, Stars: winds, outflows, Words: astrochemistry",

author = "Madzunkov, {S. M.} and MacAskill, {J. A.} and A. Chutjian and P. Ehrenfreund and Darrach, {M. R.} and G. Vidali and Shortt, {B. J.}",

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volume = "697",

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publisher = "American Astronomical Society",

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TY - JOUR

T1 - Formation of formaldehyde and carbon dioxide on an ICY grain analog using fast hydrogen atoms

AU - Madzunkov, S. M.

AU - MacAskill, J. A.

AU - Chutjian, A.

AU - Ehrenfreund, P.

AU - Darrach, M. R.

AU - Vidali, G.

AU - Shortt, B. J.

PY - 2009

Y1 - 2009

N2 - Formaldehyde (H2CO) and carbon dioxide (CO2) were produced in collisions of a superthermal, 3 eV beam of H(2S) atoms with CO molecules adsorbed on a gold surface at 4.8 K. The reaction-generated products were detected and analyzed using the techniques of temperature programmed desorption (TPD), quadrupole mass spectrometry, and a novel application of the Metropolis algorithm, random-walk procedure to identify the unique fractionation patterns of H2CO and CO2 from the patterns of other species such as N2, CO, and H2O embedded in the CO blanket and devolved in the TPD/mass spectrometry process. Reaction sequences are given to account for the formation of H2CO and CO 2.

AB - Formaldehyde (H2CO) and carbon dioxide (CO2) were produced in collisions of a superthermal, 3 eV beam of H(2S) atoms with CO molecules adsorbed on a gold surface at 4.8 K. The reaction-generated products were detected and analyzed using the techniques of temperature programmed desorption (TPD), quadrupole mass spectrometry, and a novel application of the Metropolis algorithm, random-walk procedure to identify the unique fractionation patterns of H2CO and CO2 from the patterns of other species such as N2, CO, and H2O embedded in the CO blanket and devolved in the TPD/mass spectrometry process. Reaction sequences are given to account for the formation of H2CO and CO 2.

KW - Circumstellar matter

KW - ISM: molecules

KW - Stars: winds, outflows

KW - Words: astrochemistry

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U2 - 10.1088/0004-637X/697/1/801

DO - 10.1088/0004-637X/697/1/801

M3 - Article

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SN - 0004-637X

VL - 697

SP - 801

EP - 806

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

ER -

Formation of formaldehyde and carbon dioxide on an ICY grain analog using fast hydrogen atoms

Abstract

Keywords

ASJC Scopus subject areas

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