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Electron impact dissociation of ND+: formation of D+
2011,
- HENALLUX
,
- Article scientifique
Article scientifique
Nitrogen is a common contaminant species in fusion reactors
such as the ITER (International Thermonuclear Experimental
Reactor). Thus, the collisional properties of nitrogen-containing
plasma compounds arewidely studiedexperimentally andtheoretically.
Here we show the results of absolute cross section
measurements for the electron impact dissociative excitation of
ND+ yielding D+, especially ...
Electron-impact ionization of atomic hydrogen: dynamical variational treatment
2011,
- HENALLUX
,
- Article scientifique
Article scientifique
A simple and straightforward calculating scheme is proposed for electron-impact single and multiple ionization of atoms. The method is based on the application of the Hulthén-Kohn dynamical variational principle. An effective charge seen by the scattered electron is determined for a certain type of trial wave functions mathematically in a rigorous way excluding any empirical assumptions. Validity ...
CRP on Atomic and Molecular Data for Plasma Modelling Volume 16
2014,
- HENALLUX
,
- Article scientifique
Article scientifique
This publication, arising from a Coordinated Research Project on Atomic and Molecular Data for Plasma Modelling, provides information on new data relevant to the edge region of plasmas in nuclear fusion energy devices. In this region, molecules and molecular ions are formed and react with electrons and with each other and fusion plasma modelling requires cross-sections and rate coefficients for such ...
Isotope effects in electron-impact dissociation of D2H+
2011,
- HENALLUX
,
- Article scientifique
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) ...
Electron impact multiple ionization of C+ and N+ and O+ ions
2014,
- HENALLUX
,
- Article scientifique
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 in the energy range extending from the respective thresholds up to 2.5 keV. The general feature of the measured cross sections is investigated.
III. Electron-impact dissociative ionization of C2H +2 and C2D +2
2010,
- HENALLUX
,
- Article scientifique
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 ...
II. Electron-impact dissociative excitation of C2H +2 and C2D +2
2010,
- HENALLUX
,
- Article scientifique
Article scientifique
Absolute cross-sections for electron-impact dissociative excitation of C2H +2 and C2D +2 to C2D+, CH+, C+, C +2, H+ and CH +2 singly-charged fragments have been estimated. The animated crossed-beams method is applied in the energy range from the corresponding reaction threshold up to 2.5 keV. Individual contributions for dissociative excitation are determined from the analysis of the total absolute ...
I. Electron-impact ionization and dissociation of C2H +2 and C2D +2
2010,
- HENALLUX
,
- Article scientifique
Article scientifique
Absolute cross-sections for electron-impact ionization and dissociation of C2H +2 and C2D +2 have been measured for electron energies ranging from the corresponding thresholds up to 2.5 keV. The animated crossed beams experiment has been used. Light as well as heavy fragment ions that are produced from the ionization and the dissociation of the target have been detected for the first time. The maximum ...
Electron-impact ionization and dissociation of C2D+
2010,
- HENALLUX
,
- Article scientifique
Article scientifique
Absolute cross sections for electron-impact single ionization, dissociative excitation and dissociative ionization of the ethynyl radical ion (C2D+) have been measured for electron energies ranging from the corresponding reaction thresholds to 2.5 keV. The animated crossed electron-ion beam experiment is used and results have been obtained for the production of C2D2+, C2+, C+2, CD+, C+ and D+. The ...
Electron-impact dissociation and ionization of OH+ and OD+ ions
2012,
- HENALLUX
,
- Article scientifique
Article scientifique
Absolute cross sections for electron impact ionization and dissociation of OH+ and OD+ leading
to the formation of the OH2+, O+, O2+, O3+ and D+ ions have been measured by applying the animated
electron-ion beam method in the energy range from the respective reaction thresholds up to 2.5 keV. The
maximum of the single ionization cross section is found to be (0.95±0.02) × 10−19 cm2 at 155 eV. ...