A5090229584- Nuclear Physics and Applications
- Radiation Detection and Scintillator Technologies
- Radiation Therapy and Dosimetry
- Nuclear reactor physics and engineering
- Radioactive Decay and Measurement Techniques
- Radioactivity and Radon Measurements
- Scientific Measurement and Uncertainty Evaluation
- Atomic and Subatomic Physics Research
- Radiation Effects in Electronics
- Geology and Paleoclimatology Research
- Radioactive contamination and transfer
- Paleontology and Stratigraphy of Fossils
- Advanced Frequency and Time Standards
- Nuclear physics research studies
- Hydrocarbon exploration and reservoir analysis
- Isotope Analysis in Ecology
- Electron and X-Ray Spectroscopy Techniques
- Methane Hydrates and Related Phenomena
- Fusion materials and technologies
- Atomic and Molecular Physics
- Dark Matter and Cosmic Phenomena
- Boron Compounds in Chemistry
- Radiation Dose and Imaging
- Graphite, nuclear technology, radiation studies
- DNA Repair Mechanisms
Bureau international des poids et mesures
2022-2024
Institut de Radioprotection et de Sûreté Nucléaire
2007-2022
CEA Cadarache
2020-2022
Sorbonne Université
2008-2013
Institut des Sciences de la Terre de Paris
2011
Physikalisch-Technische Bundesanstalt
2007
CEA Paris-Saclay - Etablissement de Fontenay-aux-roses
2002
Joint Research Center
2002
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2000-2002
CEA Paris-Saclay
2000
Main text Since 1976, 17 laboratories have submitted 43 samples of 54 Mn to the International Reference System (SIR) for activity comparison at Bureau des Poids et Mesures (BIPM), with identifier BIPM.RI(II)-K1.Mn-54. Recently, POLATOM (Poland) participated in and key reference value (KCRV) has been updated. The degrees equivalence between each equivalent measured SIR updated KCRV calculated results are given form a table. A graphical representation is also given. To reach main this paper,...
Abstract In order to fulfil its mission ensure and promote the global comparability of measurements, BIPM operates laboratories in fields physical metrology, ionizing radiation, chemistry time. These act as centres for scientific technical collaboration between Member States providing capabilities international measurement comparisons on a shared cost basis. They coordinate national standards agreed be highest priority, they establish maintain appropriate reference use basis key at level...
Among the deep-sea hydrothermal vent sites discovered in past 30 years, Lost City on Mid-Atlantic Ridge (MAR) is remarkable both for its alkaline fluids derived from mantle rock serpentinization and spectacular seafloor carbonate chimneys precipitated these fluids. Despite high concentrations of reduced chemicals fluids, this unique example a serpentinite-hosted system currently lacks chemosynthetic assemblages dominated by large animals typical high-temperature sites. Here we report...
Journal Article AMANDE: a new facility for monoenergetic neutron fields production between 2 keV and 20 MeV Get access V. Gressier, Gressier Institut de Radioprotection et Sûreté Nucléaire. BP 3, 13115 Saint-Paul-lez-Durance, Cedex, France *Corresponding author: vincent.gressier@irsn.fr Search other works by this author on: Oxford Academic PubMed Google Scholar J. F. Guerre-Chaley, Guerre-Chaley Lacoste, Lacoste L. Lebreton, Lebreton G. Pelcot, Pelcot Pochat, Pochat T. Bolognese-Milstajn,...
The Institute for Radiological Protection and Nuclear Safety (IRSN) the GFR, Universitat Autónoma de Barcelona (UAB) use Bonner spheres (BS) neutron spectrometry at workplaces. two systems, equipped with similar cylindrical 3He proportional counters, were simulated MCNP Monte-Carlo code to determine response neutrons of different energies each polyethylene sphere. BS systems characterized monoenergetic thermal fields. Measurements performed Physikalisch-Technische Bundesanstalt (PTB)...
The SIGMA facility was set up at IRSN to provide thermal neutrons for metrology and dosimetry purposes. consists of six Am–Be radioactive sources located in a 1.5 × m3 graphite moderator block. neutron field the calibration position, situated 50 cm from west surface assembly characterised experimentally by Monte Carlo calculations. fluence determined activation gold foils; energy distribution above 240 keV measured with proton recoil spectrometers energies 20 MeV Bonner spheres spectrometer....
The Grup de Física les Radiacions (GFR) of the Universitat Autònoma Barcelona (UAB), in collaboration with Institute for Radiological Protection and Nuclear Safety (IRSN), has developed a passive Bonner sphere system (UAB-BSS), gold foils as thermal neutron detectors, application pulsed fields or mixed neutron-photon high photon intensities. In such fields, active devices suffer from saturation dead-time effects. MCNPX Monte-Carlo code been used to determine response neutrons different...
In some branches of metrology the quantity, or quantities, to be measured and requirements for standards this these are clear-cut, although accuracies required may not always obvious. Good examples time, length mass. The quantities in neutron uses less well known. This paper lays foundation subsequent more detailed discussions problems issues faced by national institutes when developing providing standards.
The Institute for Radiological Protection and Nuclear Safety (IRSN) has developed a new spectrometry system neutron energies from 10−9 MeV to 10 GeV. This high energy range multisphere extended IRSN (HERMEIS) is gas pressure3He-based Bonner spheres set. It adapted low fluence rate measurements one of its main application concerns the determination cosmic-ray-induced spectra at ground level mountain altitudes. response matrix set 13 spheres, including three ones with tungsten lead shells, was...
To ensure the validity of their national standards, National Metrology Institutes (NMIs) participate regularly in international comparisons. In area neutron metrology, Section III Consultative Committee for Ionizing Radiation is charge organization these From September 2011 to October 2012, eleventh key comparison, named CCRI(III)-K11, took place at AMANDE facility LNE-IRSN, France. Participants from nine NMIs came with own primary reference instruments, or instruments traceable aim...
The calibration of dosemeters and spectrometers in realistic neutron fields simulating those encountered at workplaces is high necessity to provide true reliable dosimetric information the exposed nuclear workers. CANEL assembly was set-up IRSN produce such fields. It comprises a depleted uranium shell, fission neutrons, then iron water moderate them polyethylene duct. new presented facility used with 3.3 MeV neutrons. Calculations were performed MCNP4C code characterise this mixed...
EVIDOS (‘evaluation of individual dosimetry in mixed neutron and photon radiation fields’) is an European Commission (EC)-sponsored project that aims at a significant improvement protection neutron/photon fields via spectrometric dosimetric investigations representative workplaces the nuclear industry. In particular, new spectrometry methods are developed provide energy direction distribution fluence from which reference quantities derived compared to readings dosemeters. The final results...
The variation in the response of instruments with neutron energy has to be determined well-characterized monoenergetic fields. quantities associated these fields are fluence and mean peak needed determine related dosimetric quantities. At IRSN AMANDE facility, reference measurement standard for is based on a long counter calibrated 252Cf field. In this paper, final characterization device presented as well method used at calibration point
The application of a CAEN DT5730 digitizer unit for fast neutron metrology is explored. Measurements were made at the Accelerator Metrology and Neutron Applications in External Dosimetry (AMANDE) monoenergetic facility IRSN, France, over energy range from 1.2 to 7.0 MeV using BC501A scintillator. an analog system based on NIM electronics MPA-3 multichannel analyzer acquisition used, under identical beam conditions, data acquisition. Several observables compared between two systems including...
The new CANEL/T400 facility has been set-up at the Institute for Radiological Protection and Nuclear Safety (IRSN) to produce a realistic neutron field. accurate characterisation of this field is mandatory since will be used as reference source. For reason an international measuring campaign, involving four laboratories with extensive expertise in metrology spectrometry, was organised through concerted EUROMET project. Measurements were performed Bonner sphere (BS) systems determine energy...
The variation of the response instruments as a function neutron energy has to be determined in well-characterized mono-energetic fields. These fields are measured terms fluence and mean peak, providing values that required determine related dosimetric quantities. At IRSN AMANDE facility, reference measurement standard for is based on time flight (ToF) method, i.e. determination velocity, requiring pulsed beam fast detectors. In this study, we describe experimental theoretical aspects...
Neutrons are a relevant background in rare events physics. Detectors based on fast neutron-induced nuclear reactions commonly used for neutron spectroscopy. In this subject, scintillating bolometers provide an excellent energy resolution and particle discrimination by the simultaneous measurement of heat emitted light. Our group has constructed several 6Li 10B massive (LiF, Li6Eu(BO3)3, Li6Gd(BO3)3), with resolutions ranging from 16 to 200 keV. First results 32 gr 6LiF bolometer enriched at...
Abstract In order to fulfil its mission ensure and promote the global comparability of measurements, BIPM operates laboratories in fields physical metrology, time, ionizing radiation chemistry. These act as centres for scientific technical collaboration between Member States providing capabilities international measurement comparisons on a shared cost basis. They coordinate national standards agreed be highest priority, they establish maintain appropriate reference use basis key at level...