A5027181915- Radioactivity and Radon Measurements
- Radioactive Decay and Measurement Techniques
- Radiation Detection and Scintillator Technologies
- Nuclear Physics and Applications
- Radioactive contamination and transfer
- Scientific Measurement and Uncertainty Evaluation
- Medical Imaging Techniques and Applications
- Metal-Organic Frameworks: Synthesis and Applications
- Radiation Dose and Imaging
- Luminescence Properties of Advanced Materials
- Neutrino Physics Research
- Atomic and Subatomic Physics Research
- Radioactive element chemistry and processing
- Geophysical Methods and Applications
- Covalent Organic Framework Applications
- Planetary Science and Exploration
- Lanthanide and Transition Metal Complexes
- Nuclear physics research studies
- Occupational and environmental lung diseases
- Particle Detector Development and Performance
- Perovskite Materials and Applications
- Glass properties and applications
- Advanced Measurement and Detection Methods
- Optical properties and cooling technologies in crystalline materials
- Atomic and Molecular Physics
CEA LIST
2015-2025
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2015-2025
Laboratoire National Henri Becquerel
2015-2025
Université Paris-Saclay
2021-2024
École Normale Supérieure de Lyon
2024
Université Claude Bernard Lyon 1
2024
Institut Lumière Matière
2024
CEA Paris-Saclay
2015-2022
CEA Paris-Saclay - Etablissement de Saclay
2022
Institut de Radioprotection et de Sûreté Nucléaire
2015
Abstract Natural and anthropogenic gas radionuclides such as radon, xenon, hydrogen krypton isotopes must be monitored to managed pathogenic agents, radioactive diagnostic agents or nuclear activity indicators. State-of-the-art detectors based on liquid scintillators suffer from laborious preparation limited solubility for gases, which affect the accuracy of measurements. The actual challenge is find solid scintillating materials simultaneously capable concentrating gases efficiently...
Abstract Fast photoluminescence and scintillation with a Stokes shift larger than 1 eV is achieved in hetero‐ligand metal–organic framework (MOF) crystals comprising inorganic linking nodes fluorescent conjugated ligands. By finely engineering the MOF composition use of ligands strictly complementary emission absorption properties highly delocalized molecular electronic orbitals, singlet excitons diffusion enhanced through ligand framework, fully exploiting both Förster Dexter energy...
Abstract Homogenous radioactive gas contamination constitutes the hardest challenge for radioprotection due to its elusive nature. Most common are 85 Kr, 222 Rn, and tritiated ( 3 H) vapors. Each of them has different challenges, often leading specialized single‐gas detectors. The state‐of‐the‐art detection either produces chemical‐radiological waste, is hard implement online, or requires large volume. A new paradigm presented that can perform online on any fit in hand. This study use...
The nuclear industry's expansion to encompass carbon-free electricity generation from small modular reactors and fuel reprocessing necessitates enhanced detection monitoring of pure beta-emitting radioactive elements such as 3H 85Kr; this endeavour is crucial for safety authorities tasked with environmental monitoring. However, the short range electrons emitted by these gases makes challenging. Current methods, ionization chambers liquid scintillation, do not offer at same time good...
The availability of affordable continuous radon monitors opens new opportunities for studying the temporal variations indoor and more precise exposure estimates based on actual hours spent in homes workplaces. These applications require tests characteristics, including their response time. A study a promising electronic monitor with high sensitivity, RadonEye Plus2, was conducted. It found that it has excellent linearity up to 3500 Bq/m3. slight deviation from within 12% observed range...
The triple to double coincidence ratio (TDCR) liquid scintillation measurement technique is commonly used in national metrology institutes (NMIs) perform standardization of pure beta emitters. LNE-LNHB historical device, RCTD1, a quite large which has been developed and over the past 30 years with its associated electronics for measurements various radionuclides. During last 4 two new portable TDCR devices. Such instrumentation gives end-users access reference method that can be number It...
Consumer-grade electronic radon monitors are increasingly utilized by users and researchers. Fast cost-effective procedures for their metrological assurance necessary. The characteristics of 20 RadonEye Plus2 were investigated. new had low background 2.5 ± 0.5 Bq/m3. precision error the studied group was estimated at about 9 % biased (accuracy) ranged from 3 to 16 activities in range 280 – 2900 An excellent linearity all observed this range. statistical fluctuations 300 Bq/m3 9% (relative...
Halide perovskite nanocrystals act as efficient energy deposition centers and converters when used in liquid scintillation mixtures.
The DORN instrument is an alpha spectrometer that was deployed to the surface of Moon aboard Chang’E 6 spacecraft in June 2024, Apollo crater within South Polar Aitken Basin, at a latitude -41.6°S. Its purpose measure concentration radon and polonium released from lunar regolith, study origin dynamics exosphere physical thermal properties regolith. It consisted 16 silicon detectors, organised 8 Detection Units 2 Fields view, covering near far fields, measuring charged...
Abstract This work presents an outline of a detection system that employs the Compton spectrometer method to assess non-linearity scintillator light yield. A novel approach is introduced, leading more accurate measurements through separate determination intrinsic output parameters and scintillators. Key features this include use portable scintillation detector with three photomultiplier tubes for precise measurement average number detected photoelectrons incorporation recent advancements in...
Radioactive gases are of great interest for environmental measurements and can be distinguished in two categories. The natural radionuclides such as the isotopes radon (222Rn 220Rn), anthropogenic coming from fission products (isotopes Xe 85Kr) activation (3H 37Ar). Gas monitoring environment is an important issue radioprotection Comprehensive Nuclear-Test-Ban Treaty (CTBT), which both require metrological traceability these gases. For this purpose, gas chambers, 42 L 125 L, have been...
In the last decade, significant progress has been made in development of plastic scintillators (PS) with effective neutron/gamma pulse shape discrimination (PSD). this study, we investigate a scintillator remarkable PSD properties for radon detection and alpha/beta PSD. The PS outstanding alpha-/beta- PSD, energy resolution, aging stability. It exhibits absorption diffusion length 0.224(23) mm partition coefficient 10.6(11) at 20(1) °C. We show how can enhance studies on resolution...
Background: Sensitive electronic radon detectors can be an advantageous solution for continuous monitoring of dynamics in dwellings and workplaces. In order to investigate their applicability, such must subjected adequate metrological assurance, performance field conditions tested evaluated.
 Objectives: To perform laboratory tests evaluate the applicability RadonEye+2 instruments monitoring.
 Results: this work, we have performed 36 detectors, which appear linear response 222Rn...
The characterization of a scintillating metal organic framework (MOF) is not straightforward, mainly due to the small size and low density material. In this context, we present herein generic method give an easy access determination key parameter in scintillation field, namely light output. To reach this, MOF‐205 was first synthesized as millimetric‐size single crystals then sintered under pressure temperature conditions afford pellet. increased by 300% while maintaining optical properties...