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    Université de Fribourg

    Electron spectra for associative detachment in low-energy collisions of Cl⁻ and Br⁻ with H and D

    Živanov, Svetlana ; Cížek, M. ; Horáček, J. ; Allan, Michael

    In: Journal of Physics B: Atomic, Molecular and Optical Physics, 2003, vol. 36, no. 16, p. 3513-3531

    Energy spectra of electrons detached in collisions of Cl⁻ and Br⁻ with atomic hydrogen and deuterium have been measured for laboratory frame ion energies between 0.2 and 8.0 eV. Their shapes agree very well with the predictions of nonlocal resonance theory. Both types of structure predicted by the theory are observed. They are the 'v steps', at ro-vibrational thresholds, and the 'S...

    Université de Fribourg

    Effects of interchannel coupling in associative detachment: electron spectra for H+Cl⁻ and H+Br⁻ collisions

    Živanov, Svetlana ; Allan, Michael ; Cížek, M. ; Horáček, J. ; Thiel, F. A. U. ; Hotop, Hartmut

    In: Physical Review Letters, 2002, vol. 89, no. 7, p. 073201

    We present experimental and theoretical energy spectra of the electrons detached in collisions of slow Cl⁻ and Br⁻ ions with atomic hydrogen. Nonlocal resonance theory predicts two kinds of features in the spectra: steplike structures associated with rovibrational onsets and steep rises associated with interchannel coupling, the latter being absent in a calculation using the simpler...

    Université de Fribourg

    Dissociative electron attachment and electron energy-loss spectra of phenyl azide

    Živanov, Svetlana ; Ibanescu, Bogdan C. ; Paech, M. ; Poffet, Martine ; Baettig, Pio ; Sergenton, A.-C. ; Grimme, S. ; Allan, Michael

    In: Journal of Physics B: Atomic, Molecular and Optical Physics, 2007, vol. 40, no. 1, p. 101-109

    Electron-induced chemistry—dissociative electron attachment (DEA)—was studied for phenyl azide. The major fragment corresponded to the loss of N₂ and formation of the phenylnitrene anion. This process has an onset already at zero kinetic energy of the incident electron and is interpreted as proceeding via the A″π* electronic ground state of the phenyl azide anion. Other fragments,...