A5012505856- Radioactive element chemistry and processing
- Radioactive contamination and transfer
- Mass Spectrometry Techniques and Applications
- Atomic and Molecular Physics
- Radioactivity and Radon Measurements
- Advanced Chemical Physics Studies
- Nuclear Materials and Properties
- Analytical chemistry methods development
- Nuclear and radioactivity studies
- Graphite, nuclear technology, radiation studies
- Laser-induced spectroscopy and plasma
- Ion-surface interactions and analysis
- Nuclear Physics and Applications
- Nuclear materials and radiation effects
- Lanthanide and Transition Metal Complexes
- Chemical Synthesis and Characterization
- Geochemistry and Elemental Analysis
- Radiation Detection and Scintillator Technologies
- Heavy metals in environment
- Risk Perception and Management
- Crystallization and Solubility Studies
- Nanocluster Synthesis and Applications
- Layered Double Hydroxides Synthesis and Applications
- X-ray Diffraction in Crystallography
- Nuclear reactor physics and engineering
Leibniz University Hannover
2016-2025
Gottfried-Wilhelm-Leibniz-Gesellschaft
2023-2025
Institut für Klinische Forschung und Entwicklung
2021
Klinik und Poliklinik für Strahlentherapie und Radioonkologie
2015-2016
Atos (France)
2016
Karlsruhe Institute of Technology
2006-2014
Bayer (Germany)
2014
Kerntechnische Entsorgung Karlsruhe (Germany)
2013
FZI Research Center for Information Technology
2001-2011
Heidelberg University
2007-2010
Since its inauguration in 2005, the INE-Beamline for actinide research at synchrotron source ANKA (KIT North Campus) provides dedicated instrumentation x-ray spectroscopic characterization of samples and other radioactive materials. R&D work beamline focuses on various aspects nuclear waste disposal within INE's mission to provide scientific basis assessing long-term safety a final repository. The is accessible radiochemistry community through proposal system European Union Integrated...
The Fukushima nuclear accident (March 11, 2011) caused the widespread contamination of Japan by direct deposition airborne radionuclides. Analysis weekly air filters has revealed sporadic releases radionuclides long after Daiichi reactors were stabilized. One major discharge was observed in August 2013 monitoring stations north power plant (FDNPP). During this event, an station previously scarcely contaminated area suddenly reported (137)Cs activity levels that 30-fold above background....
The contamination of Japan after the Fukushima accident has been investigated mainly for volatile fission products, but only sparsely actinides such as plutonium. Only small releases were estimated in Fukushima. Plutonium is still omnipresent environment from previous atmospheric nuclear weapons tests. We soil and plants sampled at different hot spots Japan, searching reactor-borne plutonium using its isotopic ratio 240Pu/239Pu. By accelerator mass spectrometry, we clearly demonstrated...
Environmental hazards are caused by uranium mining legacies and enhanced radioactivity in utilized groundwater surface water resources. Knowledge of speciation these waters is essential for predicting radionuclide migration installing effective purification technology. The validity the thermodynamic data environmental media affected utmost importance. Therefore, a comprehensive consistent database was established according to current knowledge. included based on NEA TDB (Guillaumont et al.,...
Pu(IV) oxyhydroxide colloid growth is investigated with XAFS and LIBD. From combined results a model of formation proposed, which leads to face-centered cubic Pu sublattice having cation defects, as observed EXAFS, linear dependency log [Pu(IV)] on −log [H+] slope −2, in accord The solubility for measured LIBD close the lower limit curve from previously reported data.
To evaluate noncontrast material-enhanced steady-state free precession (SSFP) magnetic resonance (MR) angiography in the assessment of transplant renal arteries (RAs) by using digital subtraction (DSA) as reference standard.This prospective study was approved institutional review board; written informed consent obtained from all participants. In 20 allograft recipients scheduled for DSA, RAs were assessed with electrocardiographically gated nonenhanced SSFP MR performed at 1.5 T; degree...
The isotopic ratios of fission gas would provide important source information a nuclear fuel sample found in the environment. However, it is believed that during reactor accident like Chornobyl all lost and radioactive particles Exclusion Zone today are depleted gases by initial explosion subsequent fire. We disprove this hypothesis detection analysis trapped krypton xenon these particles. Our isotopes noble mass spectroscopy combination with resonance ionization spectrometry establishes...
The isotopic ratios of fission gas would provide important source information a nuclear fuel sample found in the environment. However, it is believed that during reactor accident like Chornobyl all lost and radioactive particles Exclusion Zone today are depleted gases by initial explosion subsequent fire. We disprove this hypothesis detection analysis trapped krypton xenon these particles. Our isotopes noble mass spectroscopy combination with resonance ionization spectrometry establishes...
The European Green Deal’s ambition for zero pollution requires development of highly sensitive techniques to detect ultra-low amounts pollutants and determine their isotope ratios, where mass spectrometry is a key method. project bridges the traceability gap between activity measurements – particularly estimation bias establishes new tools pollutant tracing. SI-traceable reference materials measurement procedures are being developed that significantly reduce uncertainty detection limits,...
The behavior of radionuclides in the environment (geo-, hydro-, and biosphere) is determined by interface reactions like adsorption, ion exchange, incorporation processes. Presently, operational gross parameters for distribution between solution minerals are available. For predictive modeling radionuclide mobility such systems, however, individual processes need to be localized, characterized, quantified. A prerequisite localization clarification concerned use modern advanced analytical...
Tetravalent plutonium readily undergoes hydrolysis even in highly acidic aqueous solutions. In the past, many attempts were made to quantify species by means of optical absorption spectroscopy. present work solutions ranging from 10 −5 M -2 (total Pu) concentration 0.5 HCl/NaCl (0.3 < pH c 2.1) are carefully investigated combining absorption-spectroscopy (UV-Vis, liquid core waveguide capillary) and laser-induced breakdown detection, with special emphasis on limited solubility Pu(IV). The...