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    Université de Fribourg

    Properties of the π* and σ* states of the chlorobenzene anion determined by electron impact spectroscopy

    Skalický, Tomás ; Chollet, Christophe ; Pasquier, Nicolas ; Allan, Michael

    In: Physical Chemistry Chemical Physics, 2002, vol. 4, p. 3583 - 3590

    The selectivity of vibrational excitation by electron impact has been used to unambiguously assign the negative ion states (resonances) of chlorobenzene and to settle a recent controversy on this subject. The excitation functions of the ring deformation vibrations exhibit bands in the 0.8–1.4 eV range, identifying them as temporary electron captures in the b₁ and...

    Université de Fribourg

    Structures in elastic, vibrational, and dissociative electron attachment cross sections in N₂O near threshold

    Allan, Michael ; Skalický, Tomás

    In: Journal of Physics B: Atomic, Molecular and Optical Physics, 2003, vol. 36, no. 16, p. 3397-3409

    Absolute differential cross sections were measured at 135° for the elastic and the vibrationally inelastic electron scattering from threshold to 12 eV, with emphasis on the threshold region. In addition, relative dissociative electron attachment spectra were measured from 0.1 to 3.5 eV. Structures of vibrational origin were observed at energies below 1 eV, well below the ²Π shape resonance, in...

    Université de Fribourg

    The assignment of dissociative electron attachment bands in compounds containing hydroxyl and amino groups

    Skalický, Tomás ; Allan, Michael

    In: Journal of Physics B: Atomic, Molecular and Optical Physics, 2004, vol. 37, p. 4849-4859

    Dissociative electron attachment (DEA) spectra were recorded for methanol, phenol, diethylamine, tetramethylhydrazine, piperazine, pyrrole and N,N-dimethylaniline. Comparison with He I photoelectron spectra permitted the assignment of virtually all DEA bands in the saturated compounds to core excited Feshbach resonances with double occupation of Rydberg-like orbitals and various Koopmans' states...