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Introduction aux nanotechnologies
2007, HENALLUXFoRSArticle scientifiqueCet article, introduction au « nanomonde », décrit d’abord quelques éléments historiques, puis le fonctionnement du microscope à force atomique qui est l’appareil d’observation des nanostructures. Ensuite, les voies ascendantes et descendantes d’assemblage sont expliquées en détail. Enfin, quelques applications sont présentées, certaines déjà développées dans nos laboratoires, d’autres, encore ... -
Absolute cross sections and kinetic energy release distributions for electron-impact ionization and dissociation of CD+ 4
2008, HENALLUXArticle scientifiqueAbsolute cross sections for electron-impact dissociative excitation and ionization of CD+ 4 leading to formation of ionic products (CD2+ 4, CD+ 3, CD+ 2, CD+, C+, D+ 3, D+ 2, and D+) have been measured. The animated crossed-beams method is applied in the energy range from the reaction threshold up to 2.5 keV. Around 100 eV, the maximum cross sections are found to be (3.8±0.2) ×10-19 cm2, (10.8±1.5)× ... -
Screening effects and total cross sections of single, double and triple ionization of neon by fast electrons
2008, HENALLUXArticle scientifiqueThe 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 ... -
Absolute cross sections and kinetic energy release distributions for electron-impact dissociative excitation and ionization of NeD+
2008, HENALLUXArticle scientifiqueAbsolute cross sections for electron impact dissociative excitation and ionization of NeD+ leading to the formation of singly and multiply charged products (D+, Ne+, Ne2+ and Ne3+) are reported, in the energy range from their respective thresholds to 2.5 keV. The animated crossed-beams method is used. For singly charged fragments, absolute cross sections are obtained separately for dissociative ... -
Electron-impact ionization of singly-charged neon ions
2008, HENALLUXArticle scientifiqueAbsolute cross sections for electron-impact single and multiple ionization of Ne+ leading to the formation of Neq+ (q = 2–5) are reported. The animated crossed beams method is applied in the energy range from the respective thresholds up to 2.5 keV. The maximum cross sections are found to be (4.12 ± 0.21) × 10−17 cm2, (1.42 ± 0.07) × 1018 cm2, (2.57 ± 0.14) × 10−20 cm2, (8.78 ± 0.54) × 10−22 cm2 for ... -
Impact environnemental de la production et de l’utilisation de l’huile de colza triturée dans une exploitation agricole.
2008, HENALLUXFoRSArticle scientifiqueCet article constitue une suite au travail de fin d’études consacré à la cogénération sur base d’huile de colza dans une ferme de production porcine située dans la commune de Tintigny en province de Luxembourg. Le colza produit dans cette exploitation agricole sert à la fois à la production et consommation locales du biocombustible et d’aliments pour bovins (tourteau). Le CO2 ainsi évité est ... -
Toward real-time charged-particle image reconstruction using polar onion-peeling
2009, HENALLUXArticle scientifiqueA method to reconstruct full three-dimensional photofragment distributions from their two-dimensional (2D) projection onto a detection plane is presented, for processes in which the expanding Newton sphere has cylindrical symmetry around an axis parallel to the projection plane. The method is based on: (1) onion-peeling in polar coordinates [Zhao et al., Rev. Sci. Instrum. 73, 3044 (2002)] in which ... -
Absolute cross-sections and kinetic-energy-release distributions for electron-impact ionization and dissociation of CD +3
2009, HENALLUXArticle scientifiqueAbsolute cross-sections have been measured for electron-impact dissociative excitation and ionization of CD+3/(CH+3) leading to formation of singly-charged fragments (CD +2, CH+, C+, H +2 and D+). The animated crossed-beams method is applied in the energy range from the reaction threshold up to 2.5 keV. The maximum cross-sections are found to be (14.0±1.0)×10-17 cm2, (6.5± 0.7)×10-17 cm2, (3.3± ... -
Absolute cross-sections and kinetic energy release distributions for electron-impact dissociation of D3+
2009, HENALLUXArticle scientifiqueAbsolute 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, ... -
Energy distributions of H+ fragments ejected by fast proton and electron projectiles in collision with H2O molecules
2009, HENALLUXArticle scientifiqueExperimental measurements of the kinetic energy distribution spectra of H + fragment ions released during radiolysis of water molecules in collision with 20, 50, and 100 keV proton projectiles and 35, 200, 400, and 1000 eV electron projectiles are reported using a pulsed beam and drift tube time-of-flight based velocity measuring technique. The spectra show that H + fragments carrying a ... -
Teaching european unity in a divided country
2009, HENALLUXLivre/Ouvrage ou monographieTeaching european unity in a divided country -
Absolute cross-sections and kinetic-energy-release distributions for electron-impact ionization and dissociation of CD+ 2
2009, HENALLUXArticle scientifiqueAbsolute cross-sections have been measured for electron-impact dissociative excitation and ionization of CD +2 leading to formation of CD 2+2, CD+, C+, D +2 and D+. The animated crossed-beams method is applied in the energy range from the reaction threshold up to 2.5 keV. The maximum total cross-sections are found to be (1.2±0.1)×10-17 cm2, (6.1±0.7)×10-17 cm2, (6.4±0.7)×10-17 cm2, (26.3±3.8)×10-19 ... -
Dissociative excitation of NeD+
2009, HENALLUXArticle scientifiqueMeasurements of NeD+ dissociative excitation cross section were obtained in Louvain-la-Neuve (UCL, Belgium) by using the animated crossed electron-ion beam method. The electronic structure of the system was calculated by using quantum chemistry calculations for the NeD+ ion and ab initio electron scattering calculations using the complex Kohn variational method for the resonant NeD neutral complex ... -
Le Sens religieux de l’Homme de Loschbour
2009, HENALLUXArticle scientifiqueDans cet article, je cible mon questionnement sur la manière dont l’homme préhistorique se préoccupe du corps mort. Il m’apparaît que les pratiques funéraires attestent non seulement une conscience de la mort mais aussi sa signification. Je parle de sens religieux pour indiquer le probable sentiment de l’homme préhistorique d’un au-delà de la vie actuelle : comme semblent le confirmer l’organisation ... -
Cogénération : implantation sur un site en rénovation.
2010, HENALLUXFoRSArticle scientifiqueCet article traite de toutes les étapes réalisées pour mener à bien un projet d’implantation d’un système de cogénération sur un ancien site militaire destiné à devenir un complexe regroupant des logements, hôtel, restaurant, centres de bien-être divers, école et autres services. Le bénéfice des certificats verts octroyés pour une cogénération de qualité, cumulé aux primes à l’investissement ... -
Spectroscopy and dynamics of the 7,7,8,8-tetracyanoquinodimethaneradical anion
2010, HENALLUXArticle scientifiqueThe 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, HENALLUXArticle scientifiqueAbsolute 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, HENALLUXArticle scientifiqueAbsolute 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 ... -
L'ACCOMPAGNEMENT DES NOUVEAUX ENSEIGNANTS
2010, HENALLUXLivre/Ouvrage ou monographieCette publication propose un ensemble de textes qui traitent de l'accompagnement des nouveaux enseignants en Europe et ailleurs. Sur fond de crise d'identité de ces nouveaux arrivés sur le terrain de la pédagogie, ils interrogent la nature de la relation professionnelle dans le mentorat, sa faisabilité sur le terrain des écoles, et décrivent les pratiques nationales à l'oeuvre dans des pays aussi ... -
Electron-impact dissociation and ionization of NH+: formation of N+ and N2+
2010, HENALLUXArticle scientifiqueAbsolute 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. ...