A5080183714- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Radiation Detection and Scintillator Technologies
- Nuclear physics research studies
- Nuclear Physics and Applications
- Particle Detector Development and Performance
- Radiation Effects and Dosimetry
- Luminescence Properties of Advanced Materials
- Radiation Therapy and Dosimetry
- Superconducting Materials and Applications
- Advanced NMR Techniques and Applications
- Quantum, superfluid, helium dynamics
- Dark Matter and Cosmic Phenomena
- Atomic and Molecular Physics
- Nuclear reactor physics and engineering
- Scientific Research and Discoveries
- Radioactivity and Radon Measurements
- Atmospheric Ozone and Climate
- Radioactive Decay and Measurement Techniques
- Quantum Mechanics and Applications
- Particle Accelerators and Free-Electron Lasers
- Radiation Dose and Imaging
- Electron and X-Ray Spectroscopy Techniques
- Biofield Effects and Biophysics
Universität Hamburg
2000-2021
Andrews University
1996-2007
Argonne National Laboratory
1993-2007
Humboldt-Universität zu Berlin
2005
Institute of Physics
2005
Deutsches Elektronen-Synchrotron DESY
1994-2005
University of Amsterdam
1997-2004
Netherlands Institute for Social Research
1996-2004
UCLouvain
2004
Hamburg Institut (Germany)
1994-1998
The radiation stability of plastic scintillators and wave-length shifters for the calorimeter ZEUS detector at HERA has been investigated by irradiating them with low energy protons a Co gamma -source. Changes in light yield absorption length have measured xenon flash lamp. Absorbed total doses were 0.1-25 kGy dose rates 0.03 up to 10 kGy/h. Different surrounding atmospheres applied. scintillator SCSN-38 shows strong decrease fast recovery air permanent damage. loss is 4% kGy. WLS Y-7 K-27...
The scintillation response of different types plastic scintillators to electrons and protons was studied experimentally with high precision. Equivalent electron proton energies yielding the same amount light output have been measured. results were analyzed in terms a semi-empirical formula proposed by J.B. Birks (1951).< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
The radiation stability of plastic scintillators and wavelength shifters for the calorimeter ZEUS detector has been investigated by irradiating them with protons, a /sup 60/Co source, depleted uranium. Changes in light yield, absorption length, coefficient have measured storage inert oxygen atmospheres during after irradiation. Radiation doses up to 40 kGy dose rates 30 2000 Gy/h applied. polystyrene-based scintillator SCSN-38 Y-7 K-27 PMMA (polymethyl methacrylate) initially show strong...
Asymmetries Ay for π+ and π− elastic scattering from polarized 3He were measured at incident energies passing through the π nucleon P33, or Δ(1232), resonance. The data taken Clinton P. Anderson Meson Physics Facility using high-energy pion channel P3 a large acceptance spectrometer to detect scattered pions. target, originally developed TRIUMF, was modified these experiments by addition of diode lasers. Completely unexpected negative asymmetries observed below resonance in near 50°–60°,...
The influence of temperature treatment before or after irradiation on the radiation damage plastic scintillators and wavelength shifters was measured. stability investigated. polymethyl-methacrylate (PMMA)-based showed strong recovery in argon with heating irradiation, whereas polystyrene-based scintillator SCSN-38 air suffered irradiation. UV absorbants added to shifter material Y-7 PMMA were responsible for additional scintillator/wavelength system SCSN-38/Y-7 if its cutoff wavelengths...