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    • III. Electron-impact dissociative ionization of C2H +2 and C2D +2Peer reviewedClosed access 

      2010, LECOINTRE, Julien; Cherkani-Hassani, H.; Belic, D. S.; Jureta, J. J.; Defrance, P., HENALLUX
      Article scientifique
      Absolute cross-sections for electron-impact dissociative ionization of C2 H +2 and C2 D +2 to CH+, C+, C +2 , H+, CH +2 and C2D+ fragments are determined for electron energies ranging from the corresponding threshold to 2.5 keV. Results obtained in a crossed beams experiment are analyzed to estimate the contribution of dissociative ionization to each fragment formation. The dissociative ionization ...

    • Isotope effects in electron-impact dissociation of D2H+Peer reviewedClosed access 

      2011, LECOINTRE, Julien; Jureta, J. J.; Defrance, P.; Urbain, X., HENALLUX
      Article scientifique
      Absolute cross sections have been measured using the crossed electron–ion beams method for electron-impact dissociation of the D2H+ molecular ion yielding H+, D+, HD+ and D+2 fragments. The collision energy ranges from a few eV up to 2.5 keV. Around the maximum, cross sections are found to be of a similar amplitude: (3.25 ± 0.08) × 10−17 cm2 for H+, (3.56 ± 0.15) × 10−17 cm2 for HD+ and (3.33 ± 0.11) ...

    • Multiple ionization of C+, N+ and O+ ions by fast electron impactPeer reviewedClosed access 

      2013, Lecointre, J.; Kouzakov, K. A.; Belic, D.S.; Defrance, P.; Popov, Y. V.; Shevelko, V. P., HENALLUX
      Article scientifique
      Absolute cross sections for electron impact single and multiple ionization of C+, N+ and O+ ions leading to the formation of Cq + (q = 2–4), Nq + (q = 2–5) and Oq + (q = 2–5) are reported. The animated crossed beam method is applied in the energy range extending from the respective thresholds up to 2.5 keV. The concerned target ions belong to the second row of the periodic table, with configurations ...

    • Screening effects and total cross sections of single, double and triple ionization of neon by fast electronsPeer reviewedClosed access 

      2008, LECOINTRE, Julien; Defrance, P.; Jureta, J.J.; Kereselidze, T.; Machavariani, Z.S., HENALLUX
      Article scientifique
      The Bethe–Born theory is applied to estimate the effective charges experienced by the ejected electrons at single, double and triple ionization of neon by fast electrons. The expansion coefficients appearing in the asymptotic expressions for total cross sections σn+ ~ [an+ln(Ei/In+) + bn+]/Ei are determined by fitting to these expressions the experimental data for single and multiple ionization of ...