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    • Absolute cross-sections and kinetic energy release distributions for electron-impact dissociation of D3+Peer reviewedClosed access 

      2009, LECOINTRE, Julien; Abdellahi El Ghazaly, M. O.; Jureta, J. J.; Belic, D. S.; Urbain, X.; Defrance, P., HENALLUX
      Article scientifique
      Absolute cross-sections for electron-impact dissociation of D+3 leading to the formation of D+ and D+2 products have been measured by applying the animated electron-ion beam method in the energy range from the respective thresholds up to 2.5 keV. The maximum total cross-sections are observed to be (13.9 ± 1.1) × 10−17 cm2 and (8.2 ± 0.1) × 10−17 cm2 (around 50 eV) for D+ and for D+2 fragments, ...

    • Differential and total cross sections of mutual neutralization in low-energy collisions of isotopes of H + + H −Peer reviewedClosed access 

      2016, Lecointre, J.; Nkambule, S.M.; Elander, N.; Larson, A.; Urbain, X., HENALLUX
      Article scientifique
      Mutual neutralization in the collisions of H+ and H− is studied both theoretically and experimentally. The quantum-mechanical ab initio model includes covalent states associated with the H(1)+H(n 3) limits and the collision energy ranges from 1 meV to 100 eV. The reaction is theoretically studied for collisions between different isotopes of the hydrogen ions. From the partial wave scattering ...

    • Electron-impact dissociation of HeH+: absolute cross sections for the production of Heq+ (q = 1–2) fragmentsPeer reviewedClosed access 

      2014, LECOINTRE, Julien; Jureta, J. J.; Urbain, X.; Defrance, P., HENALLUX
      Article scientifique
      Absolute cross sections have been measured for electron-impact dissociative excitation and ionization of the helium-hydride ion (HeH+) leading to the formation of helium ions Heq+ (q = 1–2). Measurements have been performed for electron energies ranging from the respective thresholds up to 2.5 keV. For He+ production, the maximum absolute cross section for dissociative excitation is found to be (2.5 ...

    • 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) ...

    • Rovibrational analysis of the XUV photodissociation of HeH + ionsPeer reviewedClosed access 

      2011, LECOINTRE, Julien; Loreau, J.; Urbain, X.; Vaeck, N., HENALLUX
      Article scientifique
      We investigate the dynamics of the photodissociation of the helium hydride ion HeH+ by XUV radiation with the aim to establish a detailed comparison with a recent experimental work carried out at the FLASH free electron laser using both vibrationally hot and cold ions. We determine the corresponding rovibrational distributions using a dissociative charge transfer setup and the same source conditions ...