A5039718474- Radioactive contamination and transfer
- Radioactive element chemistry and processing
- Radioactivity and Radon Measurements
- Nuclear Physics and Applications
- Isotope Analysis in Ecology
- Horticultural and Viticultural Research
- Hungarian Social, Economic and Educational Studies
- Nuclear and radioactivity studies
- Radiation Detection and Scintillator Technologies
- Sperm and Testicular Function
- Reproductive Biology and Fertility
- Analytical chemistry methods development
- Plant Physiology and Cultivation Studies
- Radioactive Decay and Measurement Techniques
- Paraoxonase enzyme and polymorphisms
- Fermentation and Sensory Analysis
- Advanced Chemical Physics Studies
- Advanced Photonic Communication Systems
- Nuclear Materials and Properties
- Connective tissue disorders research
- Graphite, nuclear technology, radiation studies
- Optical Network Technologies
- Nanomaterials for catalytic reactions
- Gas Sensing Nanomaterials and Sensors
- Geological and Geochemical Analysis
Joint Research Centre
2016-2025
European Commission
2011-2022
University of Pannonia
2005-2021
New York University Press
2018
Cambridge University Press
2018
Harvard University Press
2018
Chitose Institute of Science and Technology
2018
Bridge University
2018
University of Cambridge
2018
Karlsruhe University of Education
2018
Lead and strontium isotope ratios were used for the origin assessment of uranium ore concentrates (yellow cakes) nuclear forensic purposes. A simple low-background sample preparation method was developed simultaneous separation analytes followed by measurement multicollector inductively coupled plasma mass spectrometry (MC-ICPMS). The lead isotopic composition suggests applicability verification source material use radiogenic (207)Pb/(206)Pb ratio age raw can be calculated. However, during...
Abstract The rare-earth element pattern was used as an additional tool for the identification and origin assessment of uranium ore concentrates (yellow cakes) nuclear forensic purposes. By this means, source unknown material can be straightforwardly verified by comparing with that a known or declared sample. In contrast to other indicators studies, provenance also assessed in several cases even if no comparison sample is available due characteristic pattern. milling process found not change...
A novel procedure has been developed for the measurement of (143)Nd/(144)Nd isotope ratio in various uranium-bearing materials, such as uranium ores and ore concentrates (UOC) order to evaluate usefulness applicability variations provenance assessment nuclear forensics. Neodymium was separated pre-concentrated by extraction chromatography then ratios were measured multi-collector inductively coupled plasma mass spectrometry (MC-ICP-MS). The method validated standard reference materials (La...
Raman spectroscopy was used on 95 samples comprising mainly of uranium ore concentrates as well some UF4 and UO2 samples, in order to classify compounds for nuclear forensic purposes, the first time. This technique selected it is non-destructive rapid. The spectra obtained from 9 different classes chemical were subjected multivariate data analysis such principal component (PCA), partial least square-discriminant (PLS-DA) Fisher Discriminant Analysis (FDA). These ammonium diuranate (ADU),...
The paper describes the applicability of different characteristics (signatures) in nuclear safeguards and forensics for assessment uranium material provenance terms production process. study follows a ore concentrate from an to U3O8 product. It turned out that rare-earth elemental pattern, radiochronometry (age body date), sulphur organic impurities are useful find origin or history material, while certain trace-elements isotopics Pb Sr were found be inconclusive. results will important...
Nuclear Forensics is a rapidly evolving field with steadily increasing number of publications. Research in developing or consolidating signatures and methods various analytical areas, such as elemental isotopic parameters, age dating morphology have resulted significant progress. Moreover, the development new reference materials for uranium ore concentrate, application micro-analytical techniques use data evaluation machine learning deep further add to nuclear forensic toolbox. The...
Abstract Here we present a nuclear forensic study of uranium from German projects which used different geometries metallic fuel. 3b , d 4 Through measurement the 230 Th/ 234 U ratio, could determine that material had been produced in period 1940 to 1943. To geographical origin uranium, rare‐earth‐element content and 87 Sr/ 86 Sr ratio were measured. The results provide evidence was mined Czech Republic. Trace amounts 236 239 Pu detected at level their natural abundance, indicates fuel not...
A novel method has been developed for the measurement of 34S/32S isotope ratio in uranium ore concentrate (yellow cake) samples origin assessment nuclear forensics. The leachable sulphate is separated and pre-concentrated by anion exchange separation followed multi-collector inductively coupled plasma mass spectrometry (MC-ICP-MS). effect sample composition on accuracy was investigated optimized. Matching to bracketing standard necessary obtain accurate results. validated reference materials...
Employing laser ablation multi-collector ICP-MS (LA-MC-ICP-MS), its potential for evaluating the homogeneity of solid uranium (U) bearing materials was investigated. To this end, n(235U)/n(238U) ratio two low-enriched U certified reference (CRMs), i.e. powdered standard material U-010 (~1 wt% 235U) and a UO2 pellet CRM 125-A (~4 determined using line scan analysis. Four spots 5 μm diameter each were ablated per second with LA system moved at speed 20 s−1 several minutes. Experimental isotope...
Sex of early bovine embryos was determined by polymerase chain reaction (PCR) using a single blastomere removed at the 16–32 cell stage. Embryos were produced in vitro and biopsied on fifth day after fertilization. Biopsied cultured cumulus monolayer until embryo transfer. For PCR, one pair bovine-specific Y-chromosome-specific primers used. Definite signals following PCR amplification obtained 95.4% cases indicating that from preimplantation is sufficient for sex determination PCR. Nineteen...
An improved sample preparation method for the determination of americium and plutonium in sediment soil samples by inductively coupled plasma sector field mass spectrometry (ICP-SFMS) alpha-spectrometry is described. The developed procedure involves a selective CaF 2 co-precipitation pre-concentration matrix removal followed sequential extraction chromatographic separation. average chemical recovery was between 81–94% both plutonium. development also focused on elimination possible...
Nuclear forensics is a relatively young discipline in science which aims at providing information on nuclear material of unknown origin. The determination characteristic parameters through tailored analytical techniques enables establishing linkages to the material's processing history and hence provides hints its place date production intended use.
An intercomparison of the radio-chronometric ages four distinct plutonium-certified reference materials varying in chemical form, isotopic composition, and period production are presented. The cross-comparison different 234U/238Pu, 235U/239Pu, 236U/240Pu, 241Am/241Pu model purification obtained at independent analytical facilities covering a range laboratory environments from bulk sample processing to clean dedicated nuclear forensic investigation environmental samples enables true...
Au−TiO2 interface on silica support was aimed to be produced in a controlled way by use of Au hydrosol. In method A, the colloids were modified hydrolysis water-soluble Ti(IV) bis(ammoniumlactato)dihydroxide (TALH) precursor and then adsorbed Aerosil SiO2 surface. B, sol first deposited onto surface TALH it. Regular high-resolution transmission electron microscopy (TEM HRTEM) energy dispersive spectrometry (EDS) analysis allowed us conclude that, gold particles able retain TiO2 at 1.5 wt %...