VUV photoionization of acetamide studied by electron/ion coincidence spectroscopy in the 8-24 eV photon energy range

Handle URI:
http://hdl.handle.net/10754/566053
Title:
VUV photoionization of acetamide studied by electron/ion coincidence spectroscopy in the 8-24 eV photon energy range
Authors:
Schwell, Martin; Bénilan, Yves; Fray, Nicolas; Gazeau, Marie Claire; Es-sebbar, Et-touhami; García, Gustavo A.; Nahon, Laurent; Champion, Norbert; Leach, Sydney Sydney
Abstract:
A VUV photoionization study of acetamide was carried out over the 8-24 eV photon energy range using synchrotron radiation and photoelectron/photoion coincidence (PEPICO) spectroscopy. Threshold photoelectron photoion coincidence (TPEPICO) measurements were also made. Photoion yield curves and branching ratios were measured for the parent ion and six fragment ions. The adiabatic ionization energy of acetamide was determined as I.E. (1 2A′) = (9.71 ± 0.02) eV, in agreement with an earlier reported photoionization mass spectrometry (PIMS) value. The adiabatic energy of the first excited state of the ion, 1 2A″, was determined to be ≈10.1 eV. Assignments of the fragment ions and the pathways of their formation by dissociative photoionization were made. The neutral species lost in the principal dissociative photoionization processes are CH 3, NH 2, NH 3, CO, HCCO and NH 2CO. Heats of formation are derived for all ions detected and are compared with literature values. Some astrophysical implications of these results are discussed. © 2011 Elsevier B.V. All rights reserved.
KAUST Department:
Clean Combustion Research Center
Publisher:
Elsevier BV
Journal:
Chemical Physics
Issue Date:
Jan-2012
DOI:
10.1016/j.chemphys.2011.11.032
Type:
Article
ISSN:
03010104
Appears in Collections:
Articles; Clean Combustion Research Center

Full metadata record

DC FieldValue Language
dc.contributor.authorSchwell, Martinen
dc.contributor.authorBénilan, Yvesen
dc.contributor.authorFray, Nicolasen
dc.contributor.authorGazeau, Marie Claireen
dc.contributor.authorEs-sebbar, Et-touhamien
dc.contributor.authorGarcía, Gustavo A.en
dc.contributor.authorNahon, Laurenten
dc.contributor.authorChampion, Norberten
dc.contributor.authorLeach, Sydney Sydneyen
dc.date.accessioned2015-08-12T09:01:12Zen
dc.date.available2015-08-12T09:01:12Zen
dc.date.issued2012-01en
dc.identifier.issn03010104en
dc.identifier.doi10.1016/j.chemphys.2011.11.032en
dc.identifier.urihttp://hdl.handle.net/10754/566053en
dc.description.abstractA VUV photoionization study of acetamide was carried out over the 8-24 eV photon energy range using synchrotron radiation and photoelectron/photoion coincidence (PEPICO) spectroscopy. Threshold photoelectron photoion coincidence (TPEPICO) measurements were also made. Photoion yield curves and branching ratios were measured for the parent ion and six fragment ions. The adiabatic ionization energy of acetamide was determined as I.E. (1 2A′) = (9.71 ± 0.02) eV, in agreement with an earlier reported photoionization mass spectrometry (PIMS) value. The adiabatic energy of the first excited state of the ion, 1 2A″, was determined to be ≈10.1 eV. Assignments of the fragment ions and the pathways of their formation by dissociative photoionization were made. The neutral species lost in the principal dissociative photoionization processes are CH 3, NH 2, NH 3, CO, HCCO and NH 2CO. Heats of formation are derived for all ions detected and are compared with literature values. Some astrophysical implications of these results are discussed. © 2011 Elsevier B.V. All rights reserved.en
dc.publisherElsevier BVen
dc.subjectAcetamideen
dc.subjectDissociative ionizationen
dc.subjectInterstellar chemistryen
dc.subjectPhotophysicsen
dc.subjectPrebiotic photochemistryen
dc.subjectSynchrotron radiationen
dc.subjectVUVen
dc.titleVUV photoionization of acetamide studied by electron/ion coincidence spectroscopy in the 8-24 eV photon energy rangeen
dc.typeArticleen
dc.contributor.departmentClean Combustion Research Centeren
dc.identifier.journalChemical Physicsen
kaust.authorEs-sebbar, Et-touhamien
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