Article (Scientific journals)
Electronic excitation and oscillator strength of ethyl bromide by vacuum ultraviolet photoabsorption and electron energy loss spectroscopy
Giuliani, Alexandre; Tollet, Françoise; Delwiche, Jacques et al.
2000In Journal of Chemical Physics, 112 (14), p. 6285-6292
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Abstract :
[en] The high resolution vacuum ultraviolet photoabsorption spectrum of ethyl bromide has been recorded between 5 and 10.15 eV (248-122 nm) using synchrotron radiation. It exhibits a broad structureless valence band centred at 6.1 eV of low cross section followed by a region dominated by excitation of Rydberg states. A high resolution photoelectron spectrum (PES) of the lowest energy ionization band has been obtained and provides ionization energies necessary for identification of related Rydberg-excited states. Also, analysis of the vibrational fine structure in the PES has allowed identification of the normal vibrational modes excited and their wave numbers in the ion. These data, in turn, have been used in the assignment of the lowest energy photoabsorption bands arising from electron excitation into the 5s Rydberg orbital. The electron energy loss spectrum, recorded from 6.5 to 14.1 eV, under electric-dipole conditions, confirms the magnitude of the photoabsorption cross-section values obtained using the synchrotron radiation and extends the differential and optical oscillator strength values up to 14.004 eV. © 2000 American Institute of Physics.
Disciplines :
Chemistry
Author, co-author :
Giuliani, Alexandre;  Lab. Spectrosc. d'Electrons Diffuses, Université de Liège, Institut de Chimie, B-4000 Liège, Belgium
Tollet, Françoise ;  Université de Liège > Direction administrative de la faculté des sciences
Delwiche, Jacques ;  Université de Liège > Relations académiques et scientifiques (Sciences)
Mason, N. J.;  Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom
Jones, N. C.;  Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom
Gingell, J. M.;  Department of Chemistry, Christopher Ingold Laboratories, 20 Gordon Street, London WC1H 0AJ, United Kingdom
Walker, I. C.;  Department of Chemistry, Heriot-Watt University, Riccarton, Edinburgh EH14 4AS, United Kingdom
Hubin-Franskin, Marie-Jeanne ;  Université de Liège > Département de chimie (sciences) > Laboratoire de spectrométrie de masse (L.S.M.)
Language :
English
Title :
Electronic excitation and oscillator strength of ethyl bromide by vacuum ultraviolet photoabsorption and electron energy loss spectroscopy
Publication date :
2000
Journal title :
Journal of Chemical Physics
ISSN :
0021-9606
eISSN :
1089-7690
Publisher :
American Institute of Physics, New York, United States - New York
Volume :
112
Issue :
14
Pages :
6285-6292
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 08 September 2021

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