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    Université de Fribourg

    Absolute angle-differential elastic cross sections for electron collisions with diacetylene

    Allan, Michael ; Winstead, C. ; McKoy, V.

    In: Physical Review A, 2011, vol. 83, no. 6, p. 062703

    We report measured and calculated differential elastic cross sections for collisions of low-energy electrons with diacetylene (1,3-butadiyne). A generally satisfactory agreement between theory and experiment has been found. The calculated cross sections provide interesting insight into the underlying resonant structure.

    Université de Fribourg

    Electron scattering in HCl: An improved nonlocal resonance model

    Fedor, Juraj ; Winstead, C. ; McKoy, V. ; Čížek, M. ; Houfek, K. ; Kolorenč, P. ; Horáček, J.

    In: Physcial Review A, 2010, vol. 31, no. 4, p. 042702

    We present an improved nonlocal resonance model for electron-HCl collisions. The short-range part of the model is fitted to ab initio electron-scattering eigenphase sums calculated using the Schwinger multichannel method, while the long-range part is based on the ab initio potential-energy curve of the bound anion HCl-. This model significantly improves the agreement of nonlocal resonance...

    Université de Fribourg

    Improved nonlocal resonance model for electron – HCl collisions

    Fedor, Juraj ; Kolorenč, P. ; Čižek, M. ; Horáček, J. ; Winstead, C. ; McKoy, V.

    In: Journal of Physics: Conference Series, 2009, vol. 194, p. 052036

    We present an improved nonlocal resonance model for electron-HCl collisions. The short-range part of the model is based on ab-initio electron scattering eigenphase sums calculated using the Schwinger Multichannel method and the long-range part on the potential curve of the bound HCl⁻ anion. We have calculated cross sections for vibrational excitation and dissociative electron attachment....

    Université de Fribourg

    Electron scattering in ethene: Excitation of the ã³B1u state, elastic scattering, and vibrational excitation

    Allan, Michael ; Winstead, C. ; McKoy, V.

    In: Physical Review A, 2008, vol. 77, p. 042715

    Experimental and calculated absolute differential cross sections for the scattering of low-energy electrons from ethene are presented. Emphasis is on the excitation of the ã³B1u³(π,π*) state, but selected elastic and vibrational excitation cross sections are also given. In contrast to earlier calculations, which were nearly a factor of 2 too large,...