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6 results on '"Amélie Grabowski"'

1. Optimization of the Charge Comparison Method for Multiradiation Field Using Various Measurement Systems

Author

Clément Lynde, Z. El Bitar, Frederick Carrel, Giacomo Galli, Matthieu Hamel, Vincent Schoepff, Amélie Grabowski, Eva Montbarbon, Camille Frangville, G.H.V. Bertrand, Laboratoire Capteurs et Architectures Electroniques (LCAE), Département Métrologie Instrumentation & Information (DM2I), Laboratoire d'Intégration des Systèmes et des Technologies (LIST), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire d'Intégration des Systèmes et des Technologies (LIST), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Service d’Orthopédie-Traumatologie CH Metropole Savoie, CentraleSupélec, Institut Pluridisciplinaire Hubert Curien (IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Saclay-Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), European Organization for Nuclear Research (CERN), Département Recherches Subatomiques (DRS-IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), and Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Ionizing radiation, Nuclear and High Energy Physics, Photomultiplier, Computer science, spectrum analysis, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Scintillator, plastic scintillator, 01 natural sciences, beta-rays spectrometry, electronic architecture, Particle detector, 030218 nuclear medicine & medical imaging, 010305 fluids & plasmas, pulse shape discrimination, 03 medical and health sciences, 0302 clinical medicine, Silicon photomultiplier, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, Partial discharge, 0103 physical sciences, Figure of merit, Particles classification, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Electrical and Electronic Engineering, signal processing, scintillation counter, nuclear instrumentation, Charge comparison method (CCM), [PHYS]Physics [physics], fission chamber, instrumentation, Signal processing, Neutron-gamma discrimination, integration period, detector, pulse shape discrimination (PSD), Detector, neutrons, gamma-rays spectrometry, scintillator, Nuclear Energy and Engineering, Scintillation counter, [PHYS.PHYS.PHYS-MED-PH]Physics [physics]/Physics [physics]/Medical Physics [physics.med-ph], silicon photomultiplier, optimization, Algorithm, charge comparison method
Abstract

International audience; This article presents a procedure for optimizing the charge comparison method (CCM) used for pulse shape discrimination (PSD). Without prior knowledge of the signals or the readout system, our procedure automatically optimizes the integration periods maximizing the discrimination ability of the radiation detector. This procedure is innovative in its adaptability and automation without being complicated to implement on a standard computer. Another advantage of this approach is the possibility to use it even if the operation of the readout system and the recording process of the signal is not fully known. Therefore, it enables all detection systems generating signals whose temporal evolution depends on the origin to optimize the integration periods of the CCM. Our procedure is based on verifying that two criteria are met in terms of the number of components and the correlation of Gaussian fits made on the distribution of the tail-to-total integral resulting from the CCM. We tested the procedure for different application cases. First, the optimization of the integration periods of the CCM was performed for the discrimination between fast neutrons and gamma rays with a plastic scintillator and a silicon photomultiplier (SiPM) in the energy range [250 keVee; 4.5 MeVee]. The integration periods, from the laboratory's experience with photomultiplier tubes (PMTs) and plastic scintillators, gave a Figure of Merit (FoM) of 0.58 corresponding to a rejection ratio (RR) of 8.6%. The procedure improved the FoM up to 0.88 corresponding to a RR of 1.9%. We also applied the procedure to the discrimination between beta and gamma rays with a PMT and a phoswich organic detector and to the discrimination between signals collected from neutrons or partial discharges within a fission chamber.

Published
2020

2. The role of the secondary fluorophore in ternary plastic scintillators aiming at discriminating fast neutrons from gamma-rays

Author

Matthieu Hamel, Romuald Woo, Guillaume H. V. Bertrand, Robert Bernard Pansu, Chrystele Dehe-Pittance, Zhengyu Zhang, Amélie Grabowski, Eva Montbarbon, Dominique Tromson, Laboratoire Capteurs et Architectures Electroniques (LCAE), Département Métrologie Instrumentation & Information (DM2I), Laboratoire d'Intégration des Systèmes et des Technologies (LIST), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire d'Intégration des Systèmes et des Technologies (LIST), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire de Photophysique et Photochimie Supramoléculaires et Macromoléculaires (PPSM), École normale supérieure - Cachan (ENS Cachan)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), ANR-15-CE39-0006,NESSYNED,Nouveaux Systèmes Scintillants pour la Détection de Neutrons(2015), Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA))

Subjects
Materials science, Fluorophore, Physics::Instrumentation and Detectors, Biophysics, 02 engineering and technology, Scintillator, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 010402 general chemistry, 01 natural sciences, Biochemistry, neutron detection, chemistry.chemical_compound, Optics, Neutron detection, Figure of merit, Plastic scintillators, Triplet-triplet annihilation, Neutron, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], nuclear instrumentation, neutron-gamma discrimination, business.industry, Attenuation length, Gamma ray, Self-absorption, General Chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Atomic and Molecular Physics, and Optics, Neutron temperature, 0104 chemical sciences, [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, chemistry, Secondary fluorophore, 0210 nano-technology, business
Abstract

International audience; Since Helium-3 shortage announcement, organic scintillators play a major role in neutron detection. Our laboratory decided to focus on plastic scintillators and their ability to discriminate fast neutrons from gamma rays. In this work, we highlight the influence of the secondary fluorophore in lab-made plastic scintillators. The secondary fluorophore is generally added in the scintillating mixture to shift the emission wavelength towards the transparency domain of the material to improve its attenuation length. Thus, it is considered as a harmless molecule and is barely seen as a key criterion that could enhance the performances of the organic scintillator. In our work, we demonstrate that this molecule, even added at a small concentration (typically in the range 0.02–0.2 wt%), directly impacts the neutron/gamma discrimination ability of plastics. Not only the secondary fluorophore plays a role in self-absorption of the scintillating material, but also the couple it creates with the primary fluorophore has to be carefully chosen, as some specific triplet energy transfers between the two fluorophores can influence the neutron/gamma discrimination abilities of the plastic scintillator. Aside from classical photophysical inconveniences such as self-absorption or diffusion, the possibility that the whole, bulk material was heterogeneous in a photochemical point of view was also checked. Thus, various samples were cut from bulk monoliths and their pulse shape discrimination compared with the parent scintillator in terms of Figure of Merit and light output.

Published
2019

3. Nanoparticles-loaded plastic scintillators for fast/thermal neutrons/gamma discrimination: Simulation and results

Author

Jonathan Dumazert, Guillaume H. V. Bertrand, Matthieu Hamel, Camille Frangville, Amélie Grabowski, Clément Lynde, Eva Montbarbon, Romain Coulon, Amélie Venerosy, Laboratoire Capteurs et Architectures Electroniques (LCAE), Département Métrologie Instrumentation & Information (DM2I), Laboratoire d'Intégration des Systèmes et des Technologies (LIST), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire d'Intégration des Systèmes et des Technologies (LIST), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire Capteurs Diamant (LCD-LIST), ANR-15-CE39-0006,NESSYNED,Nouveaux Systèmes Scintillants pour la Détection de Neutrons(2015), Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA))

Subjects
Ionizing radiation, Nuclear and High Energy Physics, Analytical chemistry, Nanoparticle, chemistry.chemical_element, intrumentation, 02 engineering and technology, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Radiation, Scintillator, 01 natural sciences, 0103 physical sciences, MCNP, Figure of merit, fast neutrons, Neutron, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Instrumentation, nuclear instrumentation, thermal neutrons, Plastic scintillator, Physics, Neutron-gamma discrimination, nanoparticle-loaded scintillator, 010308 nuclear & particles physics, Gamma ray, simulation, 021001 nanoscience & nanotechnology, Neutron temperature, lithium tetraborate, detection chamber, chemistry, radioactivity, nanoparticles, Lithium, 0210 nano-technology
Abstract

We report herein the application of a new series of plastic scintillators loaded with lithium tetraborate nanoparticles (Li 2 B 4 O 7 ) designed for the simultaneous detection of fast neutrons, thermal neutrons and gamma-rays. First, MCNP simulations are performed to highlight the potential benefit of Li 2 B 4 O 7 loading. Then, a nanoparticle-loaded scintillator is prepared and evaluated towards the detection of a partially thermalized neutron/gamma 252-californium source. Several scenarios of radiation/matter interactions are evaluated against the observed results. A detection chamber composed of boron-containing chipboard wood has been specifically designed and a subtraction method was set up to afford the best discrimination pattern. For the first time, a triple discrimination is presented with a nanoparticles-loaded plastic scintillator, where both 6 Li(n, α ) and 10 B(n, α ) signatures are observed. A Figure of Merit of 1.40 was calculated between fast neutrons and gamma rays around 480 keVee. The Figure of Merit between fast + thermal neutrons and gamma rays is slightly worse as it is 1.16 at 380 keVee.

Published
2019

4. New perspectives for undoped CaF2 scintillator as a threshold activation neutron detector

Author

Amélie Grabowski, D. Wolski, P. Sibczynski, Adrien Sari, Joanna Iwanowska-Hanke, K. Grodzicki, Felix Pino, Lukasz Swiderski, Marek Moszynski, C.L. Fontana, Carlo Tintori, Agnieszka Syntfeld-Kazuch, Alessandro Iovene, Frederic Laine, Matthieu Hamel, Andrzej Dziedzic, Frederick Carrel, National Centre for Nuclear Research [Otwock], Narodowe Centrum Badań Jądrowych (NCBJ), Laboratoire Capteurs et Architectures Electroniques (LCAE), Département Métrologie Instrumentation & Information (DM2I), Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, CAEN S.p.A., Dipartimento di Fisica e Astronomia 'Galileo Galilei', Università degli Studi di Padova = University of Padua (Unipd), European Project: 653323,H2020,H2020-BES-2014,C-BORD(2015), Laboratoire d'Intégration des Systèmes et des Technologies (LIST), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire d'Intégration des Systèmes et des Technologies (LIST), and Universita degli Studi di Padova

Subjects
CaF2, QC1-999, Nuclear material, Scintillator, Radiation, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, plastic scintillator, SNM, Nuclear physics, Physics and Astronomy (all), Photofission, Prompt neutron, 0103 physical sciences, non-intrusive inspection, MCNP, Neutron detection, beta-rays, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, nuclear instrumentation, Physics, instrumentation, Neutron-gamma discrimination, detector, 010308 nuclear & particles physics, Special nuclear material, BaF2, Detector, neutrons, linear accelerator (LINAC), Border monitoring, Fluorine, Scintillators, TAD, Threshold activation detection, Uranium, gamma-rays, Neutron temperature, radioactivity, ionizing radiation
Abstract

In this paper we present the prompt photofission neutron detection performance of undoped CaF2 scintillator using Threshold Activation Detection (TAD). The study is carried out in the frame of C-BORD Horizon 2020 project, during which an efficient toolbox for high volume freight non-intrusive inspection (NII) is under development. Technologies for radiation monitoring are the part of the project. Particularly, detection of various radiological threats on country borders plays an important significant role in Homeland Security applications. Detection of illegal transfer of Special Nuclear Material (SNM) - 235U, 233U and 239Pu - is particular due to the potential use for production of nuclear weapon as well as radiological dispersal device (RDD) V known also as a “dirty bomb”. This technique relies on activation of 19F nuclei in the scintillator medium by fast neutrons and registration of high-energy β particles and γ-rays from the decay of reaction products. The radiation from SNM is detected after irradiation in order to avoid detector blinding. Despite the low 19F(n,α)16N or 19F(n,p)19O reaction cross-section, the method could be a good solution for detection of shielded nuclear material. Results obtained with the CaF2 detector were compared with the previous study done for BaF2 and 3He detector. These experimental results were obtained using 252Cf source and 9 MeV Varian Linatron M9 linear accelerator (LINAC). Finally, performance of the prompt neutron detection system based on CaF2 will be validated at Rotterdam Seaport during field trails in 2018.

Published
2018

5. C-BORD - an overview of efficient toolbox for high-volume freight inspection

Author

S. Moretto, Wojciech Gesikowski, Marek Szawlowski, Frederic Laine, Cedric Carasco, Andrzej Dziedzic, Cristiano Fontana, Joanna Iwanowska-Hanke, Frederick Carrel, Felix Pino, Agnieszka Syntfeld-Kazuch, K. Grodzicki, Jerzy Godlewski, Marek Moszynski, Guillaume Sannie, D. Wolski, Lukasz Swiderski, P. Sibczynski, Aleksandra Dolebska, Bertrand Perot, Z. Mianowska, Adrien Sari, A. Sardet, Amélie Grabowski, National Centre for Nuclear Research [Otwock], Narodowe Centrum Badań Jądrowych (NCBJ), Custom and Tax Office Poland [Gdynia], Laboratoire Capteurs et Architectures Electroniques (LCAE), Département Métrologie Instrumentation & Information (DM2I), Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Istituto Nazionale di Fisica Nucleare, Sezione di Padova (INFN, Sezione di Padova), Istituto Nazionale di Fisica Nucleare (INFN), Laboratoire de Mesures Nucléaires (LMN), Service Mesures et modélisation des Transferts et des Accidents graves (SMTA), Département Technologie Nucléaire (DTN), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Département Technologie Nucléaire (DTN), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), European Project: 653323,H2020,H2020-BES-2014,C-BORD(2015), Laboratoire d'Intégration des Systèmes et des Technologies (LIST), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire d'Intégration des Systèmes et des Technologies (LIST)

Subjects
Nuclear and High Energy Physics, false positive, Computer science, cargo inspection, drug trafficking, illicit substances, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 01 natural sciences, Transport engineering, Nuclear Medicine and Imaging, 0103 physical sciences, Instrumentation (computer programming), Instrumentation, Radiology, Nuclear Medicine and Imaging, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, Throughput (business), non-intrusive freight container inspection, containerized freight, dangerous substances, smuggling, 010308 nuclear & particles physics, Unit of time, End user, Frame (networking), false negative, Interdiction, Toolbox, Container (abstract data type), transport, border control, Radiology
Abstract

International audience; In the frame of the C-BORD project, five innovate technology pillars for Non-Intrusive Inspection (NII) are under development. Freight containers are potential means for smuggling, drug trafficking and transport of dangerous or illicit substances. The goal of the C-BORD project is to increase interdiction of illicit or dangerous materials in containerized freight and deliver new capabilities against critical operational requirements and constrains. Particularly, the aim of the project is to increase throughput of the container per time unit, reduce cost and time of cargo inspection and minimize the false negative and false positive alarm ratios. Finally, thanks to field trials organized during the project, capability of these systems will be proven and the C-BORD Toolbox usefulness will be validated by end users under real conditions at sea and border crosses.

Published
2017

6. Comparison of prompt and delayed photofission neutron detection techniques using different types of radiation detectors

Author

Marek Moszynski, Amélie Grabowski, Alessandro Iovene, Michal Matusiak, Lukasz Swiderski, Adrien Sari, J. Iwanowska, Frederick Carrel, Frederic Laine, Tymoteusz Kosinski, D. Wolski, Agnieszka Syntfeld-Kazuch, P. Sibczynski, Matthieu Hamel, Andrzej Dziedzic, Carlo Tintori, K. Grodzicki, National Center for Nuclear Research (NCBJ), Laboratoire Capteurs et Architectures Electroniques (LCAE), Département Métrologie Instrumentation & Information (DM2I), Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire d'Intégration des Systèmes et des Technologies (LIST (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, CAEN S.p.A., European Project: 653323,H2020,H2020-BES-2014,C-BORD(2015), Laboratoire d'Intégration des Systèmes et des Technologies (LIST), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Laboratoire d'Intégration des Systèmes et des Technologies (LIST), National Center for Nuclear Research ( NCBJ ), Département Métrologie Instrumentation & Information ( DM2I ), Laboratoire d'Intégration des Systèmes et des Technologies ( LIST ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay, and European Project : 0653323 ( 2007 )

Subjects
Special nuclear materials, Radioactive materials, Semiconductor detectors, scintillators, Nuclear material, threshold activation detection, 01 natural sciences, Photofission, Prompt neutron, LINAC, Linear accelerators, Neutron detection, Barium compounds, nuclear instrumentation, Physics, instrumentation, [ PHYS ] Physics [physics], BaF2, Chemical activation, Neutron temperature, Phosphors, Radiation detectors, radioactivity, Fission reactions, Prompt neutrons, Medical imaging, Scintillation counters, Gamma-rays, ionizing radiation, Delayed neutron, [PHYS.PHYS.PHYS-DATA-AN]Physics [physics]/Physics [physics]/Data Analysis, Statistics and Probability [physics.data-an], Activation detection, Neutron detectors, Nuclear weapons, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], plastic scintillator, SNM, Particle detector, Nuclear physics, 0103 physical sciences, Neutron, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, Delayed neutrons, 010308 nuclear & particles physics, Special nuclear material, Gamma rays, neutrons, TAD, Condition monitoring
Abstract

Conference of 2016 IEEE Nuclear Science Symposium, Medical Imaging Conference and Room-Temperature Semiconductor Detector Workshop, NSS/MIC/RTSD 2016 ; Conference Date: 29 October 2016 Through 6 November 2016; Conference Code:131365; International audience; For several years, detection of various threats on country borders plays a significant role in the frame of Homeland Security applications. One of this threat is the illicit trafficking of nuclear materials (especially including Special Nuclear Material - SNM - 235U, 233U or 239Pu), which can be potentially used for production of nuclear weapon as well as radiological dispersal device (RDD) - known also as a "dirty bomb". In order to detect the potentially hidden nuclear material, systems using linear accelerators and a group of detectors are developed by several scientific groups around the world. Besides solutions focusing on detection of delayed γ-rays or neutrons, also the systems dedicated for prompt neutron detection were proposed. One of the possible prompt neutron detection technique is known as Threshold Activation Detection (TAD). This technique relies on activation of 19F nuclei in the scintillator medium by fast neutrons and registration of high-energy particles and γ-rays from the decay of reaction products (for example, 19F(n,α)16N or 19F(n,p)19O). Recent studies in the frame of the European Horizon 2020 C-BORD project showed that, despite the low 19F(n,α)16N or 19F(n,p)19O reaction cross-section, the method could be a good solution for detection of shielded nuclear material. A benchmark of the TAD technique based on fluorine detectors with reference method focused on delayed neutron detection with 3He detectors will be presented in this paper. These experimental results were obtained using 9 MeV Varian Linatron M9 linear accelerator (LINAC).

Published
2016

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