A5037186361- Radiation Detection and Scintillator Technologies
- Nuclear Physics and Applications
- Radioactive contamination and transfer
- Radioactivity and Radon Measurements
- Quantum Chromodynamics and Particle Interactions
- Radiation Dose and Imaging
- Particle physics theoretical and experimental studies
- Atomic and Molecular Physics
- Nuclear physics research studies
- Radiation Therapy and Dosimetry
- High-Energy Particle Collisions Research
- Nuclear reactor physics and engineering
- Graphite, nuclear technology, radiation studies
- Radioactive Decay and Measurement Techniques
- Nuclear and radioactivity studies
- Atomic and Subatomic Physics Research
- X-ray Spectroscopy and Fluorescence Analysis
- Particle accelerators and beam dynamics
- Mass Spectrometry Techniques and Applications
- Advanced Radiotherapy Techniques
- Particle Accelerators and Free-Electron Lasers
- Particle Detector Development and Performance
- Magnetic confinement fusion research
- Fusion materials and technologies
- Superconducting Materials and Applications
Physikalisch-Technische Bundesanstalt
2011-2024
Hiroshima University
2012
University of Münster
1990-2000
Forschungszentrum Jülich
1996
Tbilisi State University
1995
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTResidual Equilibrium Saturation of Porous MediaH. S. Dombrowski and L. E. BrownellCite this: Ind. Eng. Chem. 1954, 46, 6, 1207–1219Publication Date (Print):June 1, 1954Publication History Published online1 May 2002Published inissue 1 June 1954https://pubs.acs.org/doi/10.1021/ie50534a037https://doi.org/10.1021/ie50534a037research-articleACS PublicationsRequest reuse permissionsArticle Views385Altmetric-Citations99LEARN ABOUT THESE METRICSArticle...
The reaction 141Pr(alpha,n)144Pm was investigated between E_alpha=11 MeV and 15 with the activation method using gamma-gamma coincidence a segmented clover-type high-purity Germanium (HPGe) detector. Measurements four other HPGe detectors were additionally made. comparison proves that is an excellent tool to investigate cross sections down microbarn range. (alpha,n) at low energy especially suited test alpha+nucleus optical-model potentials for application in astrophysical p-process....
The $\mathrm{pp}\ensuremath{\rightarrow}\mathrm{pp}{\ensuremath{\eta}}^{\ensuremath{'}}(958)$ reaction has been measured at the cooler synchrotron COSY J\"ulich using internal beam and COSY-11 facility. total cross sections four different excess energies $Q\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1.5,1.7,2.9$, $4.1\mathrm{MeV}$ have evaluated to be...
More and more spectrometric systems are being installed in environmental radiation monitoring stations instead of or addition to dosimetric detectors, because novel have been developed which do not need any cooling the necessary electronics, especially digital multichannel analysers, become manageable affordable. The advantage obtaining information about nuclide vectors can justify operation a complex spectroscopic measuring system, but if spectrometers also used for dose rate measurements...
Environmental radiation monitoring networks have been established in Europe and world-wide for the purpose of protecting population environment against ionizing radiation. Some these had during cold war period were improved after Chernobyl accident 1986. Today, German Federal Office Radiation Protection (BfS) operates an early warning network with roughly 1800 ambient dose equivalent rate (ADER) stations equally distributed over territory. The hardware software all components are developed...
The physical properties of alpha-Al(2)O(3):C are very similar to that quartz, which make it an attractive dosimetric material for geological and archaeological dating applications. Storage experiments in ultra-low-radiation underground environment (UDO at PTB) gamma-ray spectrometry show the optically stimulated luminescence (OSL) signal this does neither suffer from a significant inherent background caused by traces radionuclides (<6 microGy a(-1)) nor fading. After having performed simple...
Journal Article EURADOS intercomparison 2006 to harmonise European early warning dosimetry systems Get access H. Dombrowski, Dombrowski * 1Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany *Corresponding author: harald.dombrowski@ptb.de. Search for other works by this author on: Oxford Academic PubMed Google Scholar S. Neumaier, Neumaier I. M. G. Thompson, Thompson 229 Hazel Road, Purley on Thames, Berkshire RG8 8HR, UK F. Wissmann Radiation Protection...
After the Chernobyl nuclear power plant accident in 1986, followed by Fukushima Nuclear 25 years later, it became obvious that real-time information is required to quickly gain radiological information. As a consequence, European countries established early warning network systems with aim provide an immediate case of major emergency, supply reliable on area dose rates, contamination levels, radioactivity concentrations air and finally assess public exposure. This relevant for governmental...
A new generation of dosemeters, based on the scintillators LaBr3, CeBr3 and SrI2, read out with conventional photomultipliers, to be used in field environmental gamma-radiation monitoring, was investigated. The main features these instruments especially their outdoor performance, studied by long-term investigations under real weather conditions, are presented. systems were tested at reference sites for radiation Physikalisch-Technische Bundesanstalt. measurements compared that well...
A sensitive search of the 4-fold forbidden nonunique decay $^{50}\mathrm{V}$ has been performed. total mass measuring time product 186 kg d accumulated. reliable half-life value with highest precision so far $(2.29\ifmmode\pm\else\textpm\fi{}0.25)\ifmmode\times\else\texttimes\fi{}{10}^{17}$ years electron capture into first excited state $^{50}\mathrm{Ti}$ could be obtained. photon emission line following $\ensuremath{\beta}$ $^{50}\mathrm{Cr}$ not observed, resulting in a lower limit on...
After the Chernobyl nuclear power plant accident in 1986, all Member States of European Union have installed area dose rate monitoring networks so that radiological incidents can be detected quickly. However, different technical approaches and procedures led to inconsistencies data. In last 15 years, working group 'Environmental Radiation Monitoring' Dosimetry Group (EURADOS) has performed six pan-European intercomparison exercises for detector systems operated national dosimetric early...
In 1999 and 2002, the EURADOS Working Group on Environmental Monitoring organised two European intercomparison exercises of national network systems used to provide early warning in case a nuclear accident. total, 12 countries, represented by more than 40 scientists, participated these intercomparisons with 35 different dose rate detectors. addition, an situ gamma spectrometry was performed group scientists during 2002 exercise. Results measurements will be reported elsewhere. This report...
PTB operates an Underground laboratory for DOsimetry and spectrometry (UDO) in the Asse salt mine at a depth of 490 m below ground. The ambient dose equivalent rate UDO is only 2 nSv h−1. Therefore, well suited dosimetry low rates as other low-level measurements. provides photon calibration facility worldwide calibrations (comparable to those natural environment even below), which are traceable primary standards. Photon fields generated by using radioactive sources following nuclides: 241Am,...
The European Radiation Dosimetry Group (EURADOS) has been organising dosimetry intercomparisons for many years in response to an identified requirement from individual monitoring services (IMS) independent performance tests systems. participation gives IMS the opportunity show compliance with their own quality management system, compare results other participants and develop plans improving In growing demand, EURADOS increased number of external radiation dosimetry. Most these fit into...
As a consequence of the Chernobyl nuclear power plant accident in 1986, all European countries have installed automatic dosimetry network stations as well air sampling systems for monitoring airborne radioactivity. In Europe, at present, almost 5,000 measure dose rate values nearly real time. addition, few hundred samplers are operated. Most them need extended accumulation times with no real-time capability. National data provided to Commission (EC) via EUropean Radiological Data Exchange...
Journal Article Monte Carlo simulations of the photon calibration fields at underground laboratory PTB Get access M. Kowatari, Kowatari 1Nuclear Science Research Institute, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Search for other works by this author on: Oxford Academic PubMed Google Scholar H. Dombrowski, Dombrowski * 2Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany *Corresponding author: Harald.Dombrowski@ptb.de S. Neumaier Radiation...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDetermination of Nitrogen Content Noble GasesH. S. DombrowskiCite this: Anal. Chem. 1954, 26, 3, 526–528Publication Date (Print):March 22, 1954Publication History Published online1 May 2002Published inissue 22 March 1954https://pubs.acs.org/doi/10.1021/ac60087a029https://doi.org/10.1021/ac60087a029research-articleACS PublicationsRequest reuse permissionsArticle Views32Altmetric-Citations6LEARN ABOUT THESE METRICSArticle Views are the...