Y.H. Fleming
A5104472121- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Ion-surface interactions and analysis
- Integrated Circuits and Semiconductor Failure Analysis
- ZnO doping and properties
- Multiferroics and related materials
- Copper-based nanomaterials and applications
- Ferroelectric and Piezoelectric Materials
- Particle Detector Development and Performance
- Electron and X-Ray Spectroscopy Techniques
- Force Microscopy Techniques and Applications
- Gas Sensing Nanomaterials and Sensors
- Polymer Nanocomposites and Properties
- Electronic and Structural Properties of Oxides
- Dark Matter and Cosmic Phenomena
- Acoustic Wave Resonator Technologies
- Rheology and Fluid Dynamics Studies
- Particle Accelerators and Free-Electron Lasers
- Elasticity and Material Modeling
- Electrohydrodynamics and Fluid Dynamics
- Diamond and Carbon-based Materials Research
- Advanced Materials Characterization Techniques
- Metal and Thin Film Mechanics
- Cosmology and Gravitation Theories
Luxembourg Institute of Science and Technology
2015-2025
University of Luxembourg
2021
National Library of Luxembourg
2014
Joint Institute for Nuclear Research
2001-2005
Lund University
2001-2005
Queen Mary University of London
2001-2005
University of Birmingham
2001-2005
University of Zurich
2005
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
2005
Charles University
2005
A measurement is presented of elastic deeply virtual Compton scattering e++p→e++γ+p at HERA using data taken with the H1 detector. The cross section measured as a function photon virtuality, Q2, and invariant mass, W, γp system, in kinematic range 2<Q2<20GeV2, 30<W<120GeV |t|<1GeV2, where t squared momentum transfer to proton. compared QCD based calculations.
Abstract Copper indium gallium diselenide-based technology provides the most efficient solar energy conversion among all thin-film photovoltaic devices. This is possible due to engineered depth gradients and alkali extrinsic doping. Sodium well known impede interdiffusion of in polycrystalline Cu(In,Ga)Se 2 films, thus influencing distribution. Here, however, sodium shown have opposite effect monocrystalline gallium-free CuInSe grown on GaAs substrates. Gallium in-diffusion from substrates...
A measurement of the derivative (d ln F_2 / d lnx)_(Q^2)= -lambda(x,Q^2) proton structure function is presented in low x domain deeply inelastic positron-proton scattering. For 5*10^(-5)<=x<=0.01 and Q^2>=1.5 GeV^2, lambda(x,Q^2) found to be independent increase linearly with ln(Q^2).
Herein, we report the impact of plasma on gold nanoparticles synthesis. We used an atmospheric torch fed with aerosolized tetrachloroauric(iii) acid trihydrate (HAuCl4·3H2O) solution. The investigation showed that using pure ethanol as a solvent for precursor enabled better dispersion compared to water-containing demonstrated here deposition parameters are easy control, presenting influence concentration and time. advantage our method is no capping agent was used. assume creates carbon-based...
Room temperature oxidation of cluster-assembled nanostructured Sn films obtained by supersonic cluster beam deposition was investigated. clusters smaller than about 10 nm are observed to be fully oxidized while in larger ones, as well islands formed coalescence, completion Cabrera-Mott process is prevented resulting partial oxidation. Core-shell structures therefore obtained, with shell thickness 4 nm. Core composed highly ordered, tetragonal β-tin, micro-strain 0.16 %, tin oxides, where...
The inclusive production of D∗±(2010) mesons in deep-inelastic scattering is studied with the H1 detector at HERA. In kinematic region 1<Q2<100 GeV2 and 0.05<y<0.7 an e+p cross section for D∗± meson 8.50±0.42(stat.)+1.21−1.00(syst.) nb measured visible range ptD∗>1.5 GeV |ηD∗|<1.5. Single double differential sections are compared to perturbative QCD calculations two different evolution schemes. charm contribution proton structure, F2c(x,Q2), determined by extrapolating full phase space. This...
The preparation of ZnO thin films with controlled electrical resistivity and optical properties is often challenged by the presence defects, such as oxygen vacancies or interstitial zinc. Here, we investigate material polycrystalline prepared thermal Atomic Layer Deposition (ALD) molecular pulsing during growth. By means structural, characterizations, identify key growth parameters this unusual ALD process. Unexpectedly, influence molecules on crystallography, microstructure morphology...
Abstract An isotype heterojunction n + ‐ZnO/n‐Si photodetector is developed, showing adjustable wavelength‐selective operation at self‐powered conditions. Without an external bias voltage, the device can operate either as a broadband UV–vis–NIR or NIR‐only photodetector, depending on relative carrier concentrations of ZnO and silicon. In addition, be tuned to NIR by application regardless concentrations. At negative bias, it demonstrates photodetection, while positive photodetection....
Lead zirconate (PbZrO 3 ) stands out as the prototypical antiferroelectric material, often studied for its applications in link capacitors and actuators. However, conventional fabrication of single crystal films necessitates costly...
Abstract Chemical Solution Deposition enables low‐cost fabrication of ferroelectric HfO 2 films suitable for piezoelectric applications. Control processing parameters is utmost importance to obtain high‐quality functional films. However, the impact annealing atmosphere on properties solution‐processed not clear. In this work, influence and growth methods orientation, density electrical La:HfO studied. The 45 nm‐thick are grown by two routes, conventional (crystallization final film)...
After 2001 the upgraded ep collider HERA will provide an about five times higher luminosity for two experiments H1 and ZEUS. In order to cope with expected event rates collaboration is building a track based trigger system, Fast Track Trigger (FTT). It be integrated in first three levels (L1-L3) of scheme selectivity events charged particles. The FTT allow reconstruct 3-dimensional tracks central drift chamber down 100 MeV/c within L2 latency ~ 23 mus. To reach necessary momentum resolution...
The diffractive photoproduction of J/psi mesons is measured with the H1 detector at ep collider HERA using an integrated luminosity 78 pb^-1. differential cross section d sigma(gamma p -> Y) / t studied in range 2 < |t| 30 GeV^2, where square four-momentum transferred proton vertex. also presented as a function photon-proton centre-of-mass energy W three intervals, spanning 50 200 GeV. A fast rise observed for each and slope effective linear Pomeron trajectory to be alpha^\prime= -0.0135 \pm...
State-of-the-art secondary ion mass spectrometry (SIMS) instruments allow producing 3D chemical mappings with excellent sensitivity and spatial resolution. Several important artifacts, however, arise from the fact that SIMS mapping does not take into account surface topography of sample. The traditional reconstruction assumes initial sample is flat analyzed volume cuboid. produced images are thus affected by a more or less uncertainty on depth scale can be distorted. situation becomes even...
State-of-the-art secondary ion mass spectrometry (SIMS) instruments allow producing 3D chemical mappings with excellent sensitivity and spatial resolution. Several important artifacts however arise from the fact that SIMS mapping does not take into account surface topography of sample. In order to correct these artifacts, we have integrated a specially developed scanning probe microscopy (SPM) system commercial Cameca NanoSIMS 50 instrument. This new SPM module, which was designed as DN200CF...