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Intermediate energy cross sections for electron-impact vibrational-excitation of pyrimidine

We report differential cross sections (DCSs) and integral cross sections (ICSs) for electron-impact vibrational-excitation of pyrimidine, at incident electron energies in the range 15–50 eV. The scattered electron angular range for the DCS measurements was 15°–90°. The measurements at the DCS-level... Full description

Journal Title: Journal of Chemical Physics 07 September 2015, Vol.143(9)
Main Author: Jones, D. B
Other Authors: Ellis-Gibbings, L , García, G , Nixon, K. L , School of Biology, Chemistry and Forensic Science, University of Wolverhampton, Wolverhampton Wv1 1ly , Lopes, M. C. A , Brunger, M. J , Institute of Mathematical Sciences, University of Malaya, 50603 Kuala Lumpur
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 0021-9606 ; E-ISSN: 1089-7690 ; DOI: 10.1063/1.4929907
Link: https://www.osti.gov/biblio/22493599
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recordid: osti_s22493599
title: Intermediate energy cross sections for electron-impact vibrational-excitation of pyrimidine
format: Article
creator:
  • Jones, D. B
  • Ellis-Gibbings, L
  • García, G
  • Nixon, K. L
  • School of Biology, Chemistry and Forensic Science, University of Wolverhampton, Wolverhampton Wv1 1ly
  • Lopes, M. C. A
  • Brunger, M. J
  • Institute of Mathematical Sciences, University of Malaya, 50603 Kuala Lumpur
subjects:
  • Atomic And Molecular Physics
  • Inorganic, Organic, Physical And Analytical Chemistry
  • Comparative Evaluations
  • Differential Cross Sections
  • Electron-Molecule Collisions
  • Electrons
  • Ev Range
  • Excitation
  • Integral Cross Sections
  • Phase Studies
  • Pyrimidines
  • Resonance
  • Total Cross Sections
  • Chemistry
  • Physics
ispartof: Journal of Chemical Physics, 07 September 2015, Vol.143(9)
description: We report differential cross sections (DCSs) and integral cross sections (ICSs) for electron-impact vibrational-excitation of pyrimidine, at incident electron energies in the range 15–50 eV. The scattered electron angular range for the DCS measurements was 15°–90°. The measurements at the DCS-level are the first to be reported for vibrational-excitation in pyrimidine via electron impact, while for the ICS we extend the results from the only previous condensed-phase study [P. L. Levesque, M. Michaud, and L. Sanche, J. Chem. Phys. 122, 094701 (2005)], for electron energies ⩽12 eV, to higher energies. Interestingly, the trend in the magnitude of the lower energy condensed-phase ICSs is much smaller when compared to the corresponding gas phase results. As there is no evidence for the existence of any shape-resonances, in the available pyrimidine total cross sections [Baek et al., Phys. Rev. A 88, 032702 (2013); Fuss et al., ibid. 88, 042702 (2013)], between 10 and 20 eV, this mismatch in absolute magnitude between the condensed-phase and gas-phase ICSs might be indicative for collective-behaviour effects in the condensed-phase results.
language: eng
source:
identifier: ISSN: 0021-9606 ; E-ISSN: 1089-7690 ; DOI: 10.1063/1.4929907
fulltext: fulltext
issn:
  • 0021-9606
  • 00219606
  • 1089-7690
  • 10897690
url: Link


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titleIntermediate energy cross sections for electron-impact vibrational-excitation of pyrimidine
creatorJones, D. B ; Ellis-Gibbings, L ; García, G ; Nixon, K. L ; School of Biology, Chemistry and Forensic Science, University of Wolverhampton, Wolverhampton Wv1 1ly ; Lopes, M. C. A ; Brunger, M. J ; Institute of Mathematical Sciences, University of Malaya, 50603 Kuala Lumpur
ispartofJournal of Chemical Physics, 07 September 2015, Vol.143(9)
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subjectAtomic And Molecular Physics ; Inorganic, Organic, Physical And Analytical Chemistry ; Comparative Evaluations ; Differential Cross Sections ; Electron-Molecule Collisions ; Electrons ; Ev Range ; Excitation ; Integral Cross Sections ; Phase Studies ; Pyrimidines ; Resonance ; Total Cross Sections ; Chemistry ; Physics
descriptionWe report differential cross sections (DCSs) and integral cross sections (ICSs) for electron-impact vibrational-excitation of pyrimidine, at incident electron energies in the range 15–50 eV. The scattered electron angular range for the DCS measurements was 15°–90°. The measurements at the DCS-level are the first to be reported for vibrational-excitation in pyrimidine via electron impact, while for the ICS we extend the results from the only previous condensed-phase study [P. L. Levesque, M. Michaud, and L. Sanche, J. Chem. Phys. 122, 094701 (2005)], for electron energies ⩽12 eV, to higher energies. Interestingly, the trend in the magnitude of the lower energy condensed-phase ICSs is much smaller when compared to the corresponding gas phase results. As there is no evidence for the existence of any shape-resonances, in the available pyrimidine total cross sections [Baek et al., Phys. Rev. A 88, 032702 (2013); Fuss et al., ibid. 88, 042702 (2013)], between 10 and 20 eV, this mismatch in absolute magnitude between the condensed-phase and gas-phase ICSs might be indicative for collective-behaviour effects in the condensed-phase results.
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titleIntermediate energy cross sections for electron-impact vibrational-excitation of pyrimidine
description

We report differential cross sections (DCSs) and integral cross sections (ICSs) for electron-impact vibrational-excitation of pyrimidine, at incident electron energies in the range 15–50 eV. The scattered electron angular range for the DCS measurements was 15°–90°. The measurements at the DCS-level are the first to be reported for vibrational-excitation in pyrimidine via electron impact, while for the ICS we extend the results from the only previous condensed-phase study [P. L. Levesque, M. Michaud, and L. Sanche, J. Chem. Phys. 122, 094701 (2005)], for electron energies ⩽12 eV, to higher energies. Interestingly, the trend in the magnitude of the lower energy condensed-phase ICSs is much smaller when compared to the corresponding gas phase results. As there is no evidence for the existence of any shape-resonances, in the available pyrimidine total cross sections [Baek et al., Phys. Rev. A 88, 032702 (2013); Fuss et al., ibid. 88, 042702 (2013)], between 10 and 20 eV, this mismatch in absolute magnitude between the condensed-phase and gas-phase ICSs might be indicative for collective-behaviour effects in the condensed-phase results.

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We report differential cross sections (DCSs) and integral cross sections (ICSs) for electron-impact vibrational-excitation of pyrimidine, at incident electron energies in the range 15–50 eV. The scattered electron angular range for the DCS measurements was 15°–90°. The measurements at the DCS-level are the first to be reported for vibrational-excitation in pyrimidine via electron impact, while for the ICS we extend the results from the only previous condensed-phase study [P. L. Levesque, M. Michaud, and L. Sanche, J. Chem. Phys. 122, 094701 (2005)], for electron energies ⩽12 eV, to higher energies. Interestingly, the trend in the magnitude of the lower energy condensed-phase ICSs is much smaller when compared to the corresponding gas phase results. As there is no evidence for the existence of any shape-resonances, in the available pyrimidine total cross sections [Baek et al., Phys. Rev. A 88, 032702 (2013); Fuss et al., ibid. 88, 042702 (2013)], between 10 and 20 eV, this mismatch in absolute magnitude between the condensed-phase and gas-phase ICSs might be indicative for collective-behaviour effects in the condensed-phase results.

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date2015-09-07