Electron Spectroscopy Laboratory

Marie-Jeanne Hubin-Franskin

Institute de Chemie Sart-Tilman, B6c, B-4000 Liège, Belgium
Tel: 32-4-3663421 Fax:32-4-3662941

website: http://www.ulg.ac.be/chimiefs/unites/spectroelec.htm

Research interests

The Electron Spectroscopy Laboratory of the University of Liege (Belgium) has expertise in energy deposition and energy storage induced by electrons in molecules of biological interest. The research is centered on the energy transfer into vibrational and electronic excitation of the neutral species. The mechanisms of direct excitation and of resonant excitation trough formation of a temporary negative ion and autodetachement of the electron can be detected. The experimental method is the high resolution electron energy loss spectroscopy with angular resolution and low energy electron beams of controlled energy. Complete sets of absolute and differential elastic and inelastic cross sections of interaction of electrons with molecules are measured in the energy range of interest using the relative flow method. Subsequent chemical reaction rates used for example in radiation are deduced. Presently the emphasis is put on biomolecules in the gas phase. These data are of basic importance for interpretation and knowledge of the interaction of low energy electrons with condensed biomolecules. The molecules of biological interest are simple target systems like DNA constituents, molecules having a resemblance to these. These investigations will be extended to more complex systems. Part of the research leads to compare excitation cross sections by electron impact to those by UV photoabsorption of the synchrotron radiation.

Relevant Publications

Electron spectroscopy study of resonance-enhanced vibrational excitations of gaseous and of solid tetrahydrofuran.
M. Lepage, S. Letarte, M. Michaud, F. Motte-Tollet, M.-J. Hubin-Franskin, D. Roy, L. Sanche. J. Chem. Phys., 109 (1998) 5980-5986.

The core excitation of pyridine and pyridazine. An electron energy loss spectroscopy and ab initio study.
C. Hannay, D. Duflot, J.-P. Flament, M.-J. Hubin-Franskin. J. Chem. Phys., 110, (1999) 5600-5610

Electronic excitation and oscillator strength of ethyl bromide by VUV photoabsorption and electron energy loss spectroscopy.
A. Giuliani, F. Motte-Tollet, J. Delwiche, N.J. Mason, N.C. Jones, J.M. Gingell, I.C. Walker M.-J. Hubin-Franskin. J. Chem. Phys., 112 (2000) 6285-6292.

Re-analysis of the K-shell spectrum of benzene.
D. Duflot, J.-P. Flament, J. Heinesch, M.-J. Hubin-Franskin. J. Electron Spectrosc. Rel. Phenom. 113 (2000) 79-90.

The lowest energy triplet states of furan, studied by high resolution electron energy loss spectroscopy.
A. Giuliani, M.-J. Hubin-Franskin Int. J. Mass Spectrometry, 205 (2001) 163-169.

Spectroscopic study of the lowest energy triplet states of 2-methyl furan.
A. Giuliani, M-J. Hubin-Franskin Chem. Phys. Letters, 348 (2001) 34-38

Electronic excitation and optical cross sections of methylamine and ethylamine in the UV-VUV spectral region.
M-J. Hubin-Franskin, J. Delwiche, A. Giuliani, M.-P. Ska, F. Motte-Tollet, I.C. Walker, N.J. Mason, J.M. Gingell, N.C. Jones. J. Chem. Phys., 116 (2002) 9261-9268.

Core shell excitation of 2-propenal (acrolein) at the 01s and C1s edges : an experimental and ab initio study.
D. Duflot, J.-P. Flament, I.C. Walker, J. Heinesch, M.-J. Hubin-Franskin. J. Chem. Phys., 118 (2003) 1137-1145.

VUV optical-absorption and near-threshold electron energy-loss spectra of pyrazole.
I.C. Walker, M.H. Palmer, M.-J. Hubin-Franskin, J. Delwiche. Chem. Phys. Lett., 367 (2003) 517-522.


COST P9 Workings group(s) of interest: WG1