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Julien LECOINTRE
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Electron impact dissociation of ND+: formation of D+
2011, LECOINTRE, Julien; Belic, D.S.; Cherkani-Hassani, S.; Defrance, P.,
- HENALLUX
,
- Article scientifique
Article scientifique
Absolute cross sections for electron impact dissociation of ND+ leading to the formation of D+ have been measured by applying the animated electron-ion beam method in the energy range from the reaction threshold up to 2.5 keV. The maximum inclusive cross section is observed to be (16.8 ± 0.8) × 10−17 cm2 at the electron energy of 65.1 eV. The appearance energy for the D+ production is measured to ...
Ionisation et dissociation d’ions moléculaires par impact électronique
Livre/Ouvrage ou monographie
Les processus de collisions atomiques et moléculaires sont étudiés expérimentalement à Louvain-la-Neuve (UCL, Belgique). Les phénomènes considérés sont de première importance en physique des plasmas de fusion contrôlée. Le développement actuel du projet de réacteur nucléaire ITER (International Thermonuclear Experimental Reactor, Cadarache, France) implique spécialement un besoin toujours accru de ...
Spectroscopy and dynamics of the 7,7,8,8-tetracyanoquinodimethaneradical anion
Article scientifique
The photoelectron spectrum of the 7,7,8,8-tetracyanoquinodimethane (TCNQ) radical anion has
been measured at 3.1 eV. Additionally, the ultrafast relaxation dynamics of the first excited state
(12B3u) of TCNQ have been studied using time-resolved photoelectron spectroscopy, which
reveals that it undergoes internal conversion back to the ground state (2B2g) with an associated
lifetime of 650 fs ...
III. Electron-impact dissociative ionization of C2H +2 and C2D +2
2010, LECOINTRE, Julien; Cherkani-Hassani, H.; Belic, D. S.; Jureta, J. J.; Defrance, P.,
- 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, LECOINTRE, Julien; Cherkani-Hassani, H.; Belic, D. S.; Jureta, J. J.; Defrance, P.,
- 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 ...
Electron-impact dissociation and ionization of NH+: formation of N+ and N2+
Article scientifique
Absolute cross sections for electron-impact dissociation and ionization of NH+ leading to the formation of N+ and N2+ 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 (15.7 ± 0.7) × 10−17 cm2 and (11.1 ± 0.2) × 10−18 cm2 for N+ and N2+, respectively. ...
Ultrafast Relaxation Dynamics Observed Through Time-Resolved Photoelectron Angular Distributions
2010, LECOINTRE, Julien; Roberts, G.M.; Horke, D. A.; Verlet, J.R.R.,
- HENALLUX
,
- Article scientifique
Article scientifique
Time-resolved photoelectron imaging of the 7,7,8,8-tetracyanoquinodimethane (TCNQ) radical anion is presented. Photoelectron angular distributions (PADs) are qualitatively analyzed in terms of the simple s-p model that is based on symmetry arguments. The internal conversion dynamics from the first excited state (12B3u) to the ground state (2B2g) may be observed through temporal changes in the PADs ...
I. Electron-impact ionization and dissociation of C2H +2 and C2D +2
2010, LECOINTRE, Julien; Cherkani-Hassani, H.; Cherkani-Hassani, S.; Belic, D. S.; Jureta, J. J.; Defrance, P.,
- 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, LECOINTRE, Julien; Cherkani-Hassani, H.; Cherkani-Hassani, S.; Belic, D. S.; Jureta, J. J.; Defrance, P.,
- 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 multiple ionization of argon ions
Article scientifique
Absolute cross sections for electron impact single and multiple ionization of argon ions
leading to the formation of Ar q + (q = 2–8) are reported. The animated crossed beam method
is applied in the energy range extending from the respective thresholds up to 2.5 keV. The
maximum cross sections for the multiply charged products Ar q + (q = 2–8) are measured to be
(12.6 ± 0.6) × 10−17 cm2 for Ar2+, ...