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Electron impact excitation of the a 3B1u electronic state in C2H4: An experimentally benchmarked system?

We report on differential and integral cross section measurements for the electron impact excitation of the lowest-lying triplet electronic state (a 3B1u) in ethylene (C2H4). The energy range of the present experiments was 9 eV-50 eV, with the angular range of the differential cross section measurem... Full description

Journal Title: Journal of Chemical Physics 2012, Vol.136(18)
Main Author: Do, P
Other Authors: Nixon, K , Fuss, M , Blanco, F , Brunger, M
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 0021-9606 ; DOI: 10.1063/1.4716184
Link: http://search.proquest.com/docview/1323210696/?pq-origsite=primo
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title: Electron impact excitation of the a 3B1u electronic state in C2H4: An experimentally benchmarked system?
format: Article
creator:
  • Do, P
  • Nixon, K
  • Fuss, M
  • Blanco, F
  • Brunger, M
subjects:
  • Angular Distribution
  • Benchmarking
  • Cross Sections
  • Cross Sections (Physics)
  • Electron Impact Excitation
  • Electron States
  • Ethylene
  • Grounds
  • Condensed Matter Physics (General) (So)
  • Atomic and Molecular Physics (Ah)
ispartof: Journal of Chemical Physics, 2012, Vol.136(18)
description: We report on differential and integral cross section measurements for the electron impact excitation of the lowest-lying triplet electronic state (a 3B1u) in ethylene (C2H4). The energy range of the present experiments was 9 eV-50 eV, with the angular range of the differential cross section measurements being 15 degree -90 degree . As the ground electronic state of C2H4 is a 1Ag state, this singlet arrow right triplet excitation process is expected to be dominated by exchange scattering. The present angular distributions are found to support that assertion. Comparison, where possible, with previous experimental results from the University of Fribourg group shows very good agreement, to within the uncertainties on the measured cross sections. Agreement with the available theories, however, is generally marginal with the theories typically overestimating the magnitude of the differential cross sections. Notwithstanding that, the shapes of the theoretical angular distributions were in fact found to be in good accord with the corresponding experimental results.
language: eng
source:
identifier: ISSN: 0021-9606 ; DOI: 10.1063/1.4716184
fulltext: fulltext
issn:
  • 00219606
  • 0021-9606
url: Link


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titleElectron impact excitation of the a 3B1u electronic state in C2H4: An experimentally benchmarked system?
creatorDo, P ; Nixon, K ; Fuss, M ; Blanco, F ; Brunger, M
contributorDo, P (correspondence author)
ispartofJournal of Chemical Physics, 2012, Vol.136(18)
identifierISSN: 0021-9606 ; DOI: 10.1063/1.4716184
subjectAngular Distribution ; Benchmarking ; Cross Sections ; Cross Sections (Physics) ; Electron Impact Excitation ; Electron States ; Ethylene ; Grounds ; Condensed Matter Physics (General) (So) ; Atomic and Molecular Physics (Ah)
descriptionWe report on differential and integral cross section measurements for the electron impact excitation of the lowest-lying triplet electronic state (a 3B1u) in ethylene (C2H4). The energy range of the present experiments was 9 eV-50 eV, with the angular range of the differential cross section measurements being 15 degree -90 degree . As the ground electronic state of C2H4 is a 1Ag state, this singlet arrow right triplet excitation process is expected to be dominated by exchange scattering. The present angular distributions are found to support that assertion. Comparison, where possible, with previous experimental results from the University of Fribourg group shows very good agreement, to within the uncertainties on the measured cross sections. Agreement with the available theories, however, is generally marginal with the theories typically overestimating the magnitude of the differential cross sections. Notwithstanding that, the shapes of the theoretical angular distributions were in fact found to be in good accord with the corresponding experimental results.
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titleElectron impact excitation of the a 3B1u electronic state in C2H4: An experimentally benchmarked system?
descriptionWe report on differential and integral cross section measurements for the electron impact excitation of the lowest-lying triplet electronic state (a 3B1u) in ethylene (C2H4). The energy range of the present experiments was 9 eV-50 eV, with the angular range of the differential cross section measurements being 15 degree -90 degree . As the ground electronic state of C2H4 is a 1Ag state, this singlet arrow right triplet excitation process is expected to be dominated by exchange scattering. The present angular distributions are found to support that assertion. Comparison, where possible, with previous experimental results from the University of Fribourg group shows very good agreement, to within the uncertainties on the measured cross sections. Agreement with the available theories, however, is generally marginal with the theories typically overestimating the magnitude of the differential cross sections. Notwithstanding that, the shapes of the theoretical angular distributions were in fact found to be in good accord with the corresponding experimental results.
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abstractWe report on differential and integral cross section measurements for the electron impact excitation of the lowest-lying triplet electronic state (a 3B1u) in ethylene (C2H4). The energy range of the present experiments was 9 eV-50 eV, with the angular range of the differential cross section measurements being 15 degree -90 degree . As the ground electronic state of C2H4 is a 1Ag state, this singlet arrow right triplet excitation process is expected to be dominated by exchange scattering. The present angular distributions are found to support that assertion. Comparison, where possible, with previous experimental results from the University of Fribourg group shows very good agreement, to within the uncertainties on the measured cross sections. Agreement with the available theories, however, is generally marginal with the theories typically overestimating the magnitude of the differential cross sections. Notwithstanding that, the shapes of the theoretical angular distributions were in fact found to be in good accord with the corresponding experimental results.
doi10.1063/1.4716184
urlhttp://search.proquest.com/docview/1323210696/
pages184313
eissn10897690
date2012-05-14