Search results for: Fabien Pointurier

Items from 1 to 16 out of 16 results

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Method for detecting and characterising actinide-bearing micro-particles in soils and sediment of the Fukushima Prefecture, Japan

Hugo Jaegler, Fabien Pointurier, Yuichi Onda, Jaime F. Angulo, more

Journal of Radioanalytical and Nuclear Chemistry > 2019 > 321 > 1 > 57-69

The Fukushima Dai-ichi nuclear power plant accident released limited amounts of actinides on soils of Japan. Characterisation of these particles is essential to determine the fate of actinides in the environment. The method presented in this paper, based on α-tracks detections, microscope observations and mass-spectrometry measurements, was designed to identify and characterize actinide-bearing particles...

article

Determination of the isotopic composition of single sub‐micrometer‐sized uranium particles by laser ablation coupled with multi‐collector inductively coupled plasma mass spectrometry

Anne‐Laure Ronzani, Amélie Hubert, Fabien Pointurier, Olivier Marie, more

Rapid Communications in Mass Spectrometry > 33 > 5 > 419 - 428

Rationale A multi‐collector inductively coupled plasma (MC‐ICP) mass spectrometer coupled to a UV ns‐laser ablation (LA) system was used to measure uranium isotopic ratios (²³⁴U/²³⁸U, ²³⁵U/²³⁸U and ²³⁶U/²³⁸U) in single uranium particles of various sizes and isotopic compositions, including home‐made sub‐micrometric natural uranium particles of narrow size distribution (415 ± 60 nm). Methods The...

article

Colloidal mobilization from soil and transport of uranium in (sub)-surface waters

Stéphanie Harguindeguy, Pierre Crançon, Martine Potin Gautier, Fabien Pointurier, more

Environmental Science and Pollution Research > 2019 > 26 > 6 > 5294-5304

An analytical methodology was developed to characterize the colloidal distribution of trace elements of interest in environmental waters sampled in a same site and enables the different colloidal distributions from waters to be compared. The purpose was to provide consistent information related to the origin and nature of colloids responsible for the transport of trace element(s). The work was motivated...

article

Qualification of heavy water based irradiation device in the JSI TRIGA reactor for irradiations of FT-TIMS samples for nuclear safeguards

Vladimir Radulović, Aljaž Kolšek, Anne-Laure Fauré, Anne-Claire Pottin, more

Nuclear Instruments and Methods in Physics Research Section A: Accelerators,... > 2018 > 885 > C > 139-144

The Fission Track Thermal Ionization Mass Spectrometry (FT-TIMS) method is considered as the reference method for particle analysis in the field of nuclear Safeguards for measurements of isotopic compositions (fissile material enrichment levels) in micrometer-sized uranium particles collected in nuclear facilities. An integral phase in the method is the irradiation of samples in a very well thermalized...

article

Comparing results of X-ray diffraction, µ-Raman spectroscopy and neutron diffraction when identifying chemical phases in seized nuclear material, during a comparative nuclear forensics exercise

Stina Holmgren Rondahl, Fabien Pointurier, Linnea Ahlinder, Henrik Ramebäck, more

Journal of Radioanalytical and Nuclear Chemistry > 2018 > 315 > 2 > 395-408

This work presents the results for identification of chemical phases obtained by several laboratories as a part of an international nuclear forensic round-robin exercise. In this work powder X-ray diffraction (p-XRD) is regarded as the reference technique. Neutron diffraction produced a superior high-angle diffraction pattern relative to p-XRD. Requiring only small amounts of sample, µ-Raman spectroscopy...

article

Development toward a double focusing isotopic separator for noble gas isotope enrichment

Bernard Lavielle, Bertrand Thomas, Eric Gilabert, Gregory Canchel, more

Journal of Mass Spectrometry > 51 > 10 > 908 - 913

A double focusing sector field mass filter used in Nier–Johnson geometry has been built in order to perform Kr isotope enrichment for ⁸¹Kr and ⁸⁵Kr isotopes. The principle consists in implanting Kr⁺ ions accelerated at 7 keV in Al foils after separation using the magnetic sector. A specific ion source has been designed capable of generating high Kr⁺ ion beams (>0.5 μA) to transfer into the collecting...

article

Determination of ionization efficiencies of thermal ionization cavity sources by numerical simulation of charged particle trajectories including space charge

Colin Maden, Heinrich Baur, Anne-Laure Fauré, Amélie Hubert, more

International Journal of Mass Spectrometry > 2016 > 405 > C > 39-49

An in-house developed code, Sofie, and the methods used for numerical determination of the ionization efficiency of thermal ionization cavity (TIC) sources up to intermediate temperatures (<2500K for cavity dimensions of a few millimetres) are presented, thus, creating a tool to identify cavity geometries offering better ionization efficiencies and to aid in matching the ion beam produced by a...

article

Round-robin ²³⁰Th–²³⁴U age dating of bulk uranium for nuclear forensics

Amy M. Gaffney, Amélie Hubert, William S. Kinman, Masaaki Magara, more

Journal of Radioanalytical and Nuclear Chemistry > 2016 > 307 > 3 > 2055-2060

In an inter-laboratory measurement comparison study, four laboratories determined ²³⁰Th–²³⁴U model ages of uranium certified reference material NBL U050 using isotope dilution mass spectrometry. The model dates determined by the participating laboratories range from 9 March 1956 to 19 October 1957, and are indistinguishable given the associated measurement uncertainties. These model ages are concordant...

article

Measurement of the isotopic composition of uranium micrometer-size particles by femtosecond laser ablation-inductively coupled plasma mass spectrometry

Amélie Hubert, Fanny Claverie, Christophe Pécheyran, Fabien Pointurier

Spectrochimica Acta Part B: Atomic Spectroscopy > 2014 > 93 > Complete > 52-60

In this paper, we will describe and indicate the performance of a new method based on the use of femtosecond laser ablation (fs-LA) coupled to a quadrupole-based inductively coupled plasma mass spectrometer (ICP-QMS) for analyzing the isotopic composition of micrometer-size uranium particles. The fs-LA device was equipped with a high frequency source (till 10kHz). We applied this method to 1–2μm diameter-uranium...

article

Performance of laser ablation: quadrupole-based ICP-MS coupling for the analysis of single micrometric uranium particles

Fabien Pointurier, Amélie Hubert, Anne-Claire Pottin

Journal of Radioanalytical and Nuclear Chemistry > 2013 > 296 > 2 > 609-616

In this paper we describe the application of laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) coupling to particle analysis, i.e., the determination of the isotopic composition of micrometric uranium particles. The performances of this analysis technique are compared with those of the two reference particle analysis techniques: secondary ion mass spectrometry (SIMS) and fission...

article

A method for dating small amounts of uranium

Fabien Pointurier, Amélie Hubert, Gaëlle Roger

Journal of Radioanalytical and Nuclear Chemistry > 2013 > 296 > 2 > 593-598

In this study we describe a method for uranium dating (i.e. determination of the date of the last chemical purification undergone by the material) by measurement of the ²³⁰Th/²³⁴U ratio, applicable to sub-microgram quantities. The chosen protocol (AG1x8 resin in hydrochloric acid medium) has been tested on separation microcolumns (100 μl). This ‘microchemistry’ technique considerably limits the risks...

article

Round-robins in the area of uranium and plutonium bulk analysis of environmental samples

Fabien Pointurier, Ross W. Williams, Stephen P. LaMont, Robert E. Steiner, more

Journal of Radioanalytical and Nuclear Chemistry > 2013 > 296 > 2 > 599-608

In the framework of a collaboration between laboratories involved in bulk U and Pu analysis of environmental samples (DIF centre of the French Commissariat à l’Energie Atomique, US National Laboratories of New Brunswick, Lawrence Livermore, Pacific Northwest, Oak Ridge, and Los Alamos), two round-robins were organised, each one consisting of the complete analysis (chemical preparation and isotope...

article

Application of Nanosecond-UV Laser Ablation–Inductively Coupled Plasma Mass Spectrometry for the Isotopic Analysis of Single Submicrometer-Size Uranium Particles

Fabien Pointurier, Anne-Claire Pottin, Amélie Hubert

Analytical Chemistry > 2011 > 83 > 20 > 7841 - 7848

article

Investigation of uranium–colloid interactions in soil by dual field-flow fractionation/capillary electrophoresis hyphenated with inductively coupled plasma-mass spectrometry

Céline Claveranne-Lamolère, Jean Aupiais, Gaëtane Lespes, Jérôme Frayret, more

Talanta > 2011 > 85 > 5 > 2504-2510

This paper deals with the study of uranium–colloid interactions in a carbonated soil. The work is focused on the immediately available fraction obtained after a leaching process, according to a normalized batch method. In order to characterize the different colloidal carriers, Asymmetrical Flow Field-Flow Fractionation (As-Fl-FFF) coupled to different detectors (UV, Multi Angle Laser Light Scattering...

article

Combined use of medium mass resolution and desolvation introduction system for accurate plutonium determination in the femtogram range by inductively coupled plasma-sector-field mass spectrometry

Fabien Pointurier, Anne-Claire Pottin, Philippe Hémet, Amélie Hubert

Spectrochimica Acta Part B: Atomic Spectroscopy > 2011 > 66 > 3-4 > 261-267

Formation of a polyatomic species made of an atom of a heavy element like lead, mercury or iridium, and atoms abundant in plasma (argon, nitrogen, oxygen, and hydrogen) when using an inductively coupled plasma-sector-field mass spectrometer (ICP-SFMS) may lead to false detection of femtograms (fg) of plutonium or bias in the measured concentrations. Mathematical corrections, based on the measurement...

article

Colloidal transport of uranium in soil: Size fractionation and characterization by field-flow fractionation–multi-detection

Céline Claveranne-Lamolère, Gaëtane Lespes, Stéphane Dubascoux, Jean Aupiais, more

Journal of Chromatography A > 2009 > 1216 > 52 > 9113-9119

The aim of this study was to characterize colloids associated with uranium by using an on-line fractionation/multi-detection technique based on asymmetrical flow field-flow fractionation (As-Fl-FFF) hyphenated with UV detector, multi angle laser light scattering (MALLS) and inductively coupling plasma-mass spectrometry (ICP-MS). Moreover, thanks to the As-Fl-FFF, the different colloidal fractions...

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Keywords

URANIUM (6)
ICP-MS (5)
FISSION TRACKS (2)
MASS SPECTROMETRY (2)
NUCLEAR FORENSICS (2)
PLUTONIUM (2)
RADIOCHRONOMETRY (2)
230TH–234U AGE DATING (1)
ACTINIDE-BEARING PARTICLES (1)
ACTIVATION METHOD (1)
AS-FL-FFF (1)
ASYMMETRIC FLOW FIELD-FLOW FRACTIONATION (1)
ATOMIC MASS SPECTROMETRY (1)
BULK ANALYSIS (1)
CAPILLARY ELECTROPHORESIS (1)
CAVITY GEOMETRY (1)
CHARGED PARTICLE OPTICS (1)
COLLOIDAL CHARACTERIZATION (1)
COLLOIDS (1)
DATING (1)
DESOLVATION INTRODUCTION SYSTEM (1)
FEMTOSECOND LASER ABLATION (1)
FLOW FIELD-FLOW FRACTIONATION (1)
FORENSICS (1)
FT-TIMS (1)
FUKUSHIMA DAI-ICHI NUCLEAR POWER PLANT ACCIDENT (1)
HUMIC SUBSTANCES (1)
INTER-COMPARISON (1)
ION IMPLANTATION (1)
ION SOURCE (1)
IONIZATION EFFICIENCY (1)
ISOTOPE ENRICHMENT (1)
LASER ABLATION (1)
LIGHT SCATTERING (1)
MCNP SIMULATIONS (1)
MICROCHEMISTRY (1)
MICROSCOPE CHARACTERISATION (1)
MOLECULAR INTERFERENCE (1)
NEUTRON DIFFRACTION (1)
NOBLE GASES (1)
PARTICLE ANALYSIS (1)
PARTICLES (1)
PHASE IDENTIFICATION (1)
ROUND-ROBIN (1)
SHAPE INDEX (1)
SIZE DISTRIBUTION (1)
SOIL NANOPARTICLES (1)
SOLID STATE NUCLEAR TRACK DETECTOR (1)
SPACE CHARGE (1)
SWIPE SAMPLES (1)
THERMAL IONIZATION CAVITY (1)
THORIUM-230 (1)
TRACE ANALYSIS (1)
TRANSPORT (1)
TRIGA (1)
URANIUM OXIDE (1)
URANIUM PARTICLES (1)
XRD (1)
Μ-RAMAN SPECTROSCOPY (1)
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Data set

Springer (7)
Elsevier (6)
Wiley (2)
ACS (1)

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Search results for: Fabien Pointurier

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