A5013026224- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Electron and X-Ray Spectroscopy Techniques
- Heat transfer and supercritical fluids
- Nuclear Engineering Thermal-Hydraulics
- Particle Detector Development and Performance
- Nuclear reactor physics and engineering
- Fluid Dynamics and Turbulent Flows
- Dark Matter and Cosmic Phenomena
- Catalysts for Methane Reforming
- Combustion and flame dynamics
- Advanced Materials Characterization Techniques
- Advanced Electron Microscopy Techniques and Applications
- Fluid Dynamics and Vibration Analysis
- Thin-Film Transistor Technologies
- Silicon and Solar Cell Technologies
- Nuclear Physics and Applications
- Fluid Dynamics and Heat Transfer
- Radiation Detection and Scintillator Technologies
- Subcritical and Supercritical Water Processes
- X-ray Spectroscopy and Fluorescence Analysis
- Atomic and Subatomic Physics Research
- Nuclear physics research studies
- Lattice Boltzmann Simulation Studies
Delft University of Technology
2013-2024
University of Wuppertal
2019-2023
Bruker (Germany)
2008-2016
Bridge University
2016
New York University Press
2016
Chitose Institute of Science and Technology
2016
University of Cambridge
2016
Cambridge University Press
2016
Harvard University Press
2016
Siemens (Germany)
2011-2014
We report the observation of a heavy particle $J$, with mass $m=3.1$ GeV and width approximately zero. The was made from reaction $p+\mathrm{Be}\ensuremath{\rightarrow}{e}^{+}+{e}^{\ensuremath{-}}+x$ by measuring ${e}^{+}{e}^{\ensuremath{-}}$ spectrum precise pair spectrometer at Brookhaven National Laboratory's 30-GeV alternating-gradient synchrotron.
We report the analysis of spatial energy distribution data for ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}\mathrm{hadrons}$ obtained with MARK-J detector at PETRA. define quantity "oblateness" to describe flat shape configuration and three-jet structure which is unambiguously observed first time. Our can be explained by quantum chromodynamic predictions production quark-antiquark pairs accompanied hard noncollinear gluons.
Heated or cooled fluids at supercritical pressure show large variations in thermophysical properties, such as the density, dynamic viscosity and molecular Prandtl number, which strongly influence turbulence characteristics. To investigate this, direct numerical simulations were performed of a turbulent flow (CO $_{2}$ 8 MPa) an annulus with hot inner wall cold outer wall. The pseudo-critical temperature lies close to wall, results strong property that region. shear stress intensities...
Abstract A generic, mass conservative local grid refinement technique for the lattice‐Boltzmann method (LBM) is proposed. As a volumetric description of equation applied, conservation can be imposed by allowing particles to move from coarse cells fine and vice versa in propagation step. In contrast most existing techniques, no spatial temporal interpolation particle densities applied. Moreover, since communication between grids independent on collision step, used any LBM scheme. It was found...
The present work experimentally demonstrates that the conversion of CO2 to long-chain hydrocarbons via shift and Fischer−Tropsch reaction can be enhanced by in situ H2O removal. experiments are carried out a packed-bed reactor with an integrated silica membrane. Though membrane exhibits low permselectivities regarding under conditions, deficiencies permselectivity overcome choice H2 H2/CO2 as sweep-gas. increase yield is attributed removal H2O, which shown experimental data analysis based on...
We present results of measurements on photoproduction $\ensuremath{\rho}$ mesons. Analysis ${10}^{6}$ measured events in a four-dimensional data matrix $\frac{d\ensuremath{\sigma}(A, m, p, {t}_{\ensuremath{\perp}})}{d\ensuremath{\Omega}\mathrm{dm}}$ with dimensions 14\ifmmode\times\else\texttimes\fi{}20\ifmmode\times\else\texttimes\fi{}10\ifmmode\times\else\texttimes\fi{}20 yields precise information nuclear density distributions for production. obtain the Woods-Saxon radii...
In an experiment performed at the Deutsches Elektronen-Synchrotron (DESY) 6.2-GeV electron synchrotron we have studied produc- tion, forward angles, of w+m pairs from reaction + y+A-A+m +m Measurements were made for various target nuclei A (Be, C, Al, Cu, Ag, and Pb), momenta system P (2.8, 3.04, 3. 5, 4.5GeV/c), peak incident bremsstrahlung en- ergies kmax (4.35 6.02 GeV).The objects fourfold: first, to search possible 0+, 1, 2+, ~~r esonances by measuring pair invariant- mass distribution...
We present results on the determination of a set strong-interaction nuclear radii using photoproduction neutral rho mesons. Analysis ${10}^{6}$ events from 13 complex nuclei yields Woods-Saxon $R(A)=(1.12\ifmmode\pm\else\textpm\fi{}0.02){A}^{\frac{1}{3}}$ fm.
Measurements of the reactions ${e}^{+}+{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{e}^{+}+{e}^{\ensuremath{-}}$, ${\ensuremath{\mu}}^{+}+{\ensuremath{\mu}}^{\ensuremath{-}}$, and ${\ensuremath{\tau}}^{+}+{\ensuremath{\tau}}^{\ensuremath{-}}$ at PETRA energies (${s}^{\frac{1}{2}}=13,17,27.4,30 \mathrm{and} 31.6$ GeV) are reported. The results show that these agree well with predictions quantum electrodynamics thus determining all known charged leptons pointlike particles to a distance...
Extended abstract of a paper presented at Microscopy and Microanalysis 2009 in Richmond, Virginia, USA, July 26 – 30,
The results of a high-statistics study inclusive muon spectra at PETRA are reported. Improved mass limits have been obtained for heavy quarks, leptons, and charged Higgs particles. It is shown that the fragmentation properties b quarks c different, with mean variables 〈zb〉=0.75±0.03±0.06, 〈zc〉=0.46±0.02±0.05 average semileptonic branching ratio B C hadrons R(B)=(10.5±1.5±1.3)%, R(C)=(11.5±1.0±1.7)%.Received 22 April 1983DOI:https://doi.org/10.1103/PhysRevLett.51.443©1983 American Physical Society
With use of the MARK-J detector at $\sqrt{s}=34.7$ GeV 21 000 ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}\mathrm{hadron}$ events have been collected. By measurement asymmetry in angular energy correlations strong coupling constant ${\ensuremath{\alpha}}_{s}=0.13\ifmmode\pm\else\textpm\fi{}0.01 (\mathrm{statistical})\ifmmode\pm\else\textpm\fi{}0.02 (\mathrm{systematic})$ is determined, complete second order, and independent fragmentation models QCD cutoff values used.
We report a high-statistics experiment measuring the structure of ${e}^{+}{e}^{\ensuremath{-}}$ mass spectrum from photoproduction $\ensuremath{\rho}$ and $\ensuremath{\omega}$ mesons. At 5.1 GeV, based on 4000 events, analysis spectra yields ratio vector-meson-photon coupling constants $\frac{{{\ensuremath{\gamma}}_{\ensuremath{\omega}}}^{2}}{{{\ensuremath{\gamma}}_{\ensuremath{\rho}}}^{2}}={9.4}_{\ensuremath{-}1.6}^{+2.6}$ $\ensuremath{\rho}\ensuremath{-}\ensuremath{\omega}$ phase...
Abstract Originally designed as position-sensitive detectors for particle tracking, silicon drift (SDDs) are now used high-count rate X-ray spectroscopy, operating close to room temperature. Their low-capacitance read-node concept places them among the fastest high-resolution detector systems. They have been in a new spectrum of experiments wide field spectroscopy: fluorescent analysis, diffrac-tometry, materials and synchrotron such holography element imaging scanning electron microscopes....