Auswahl der wissenschaftlichen Literatur zum Thema „Détecteur de neutron“
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Zeitschriftenartikel zum Thema "Détecteur de neutron"
El Messaoudi, M., A. Chouak und M. Lferde. „Comparaison de dosimètres individuels de neutrons pour utilisation autour du futur réacteur TRIGA du Maroc : détecteur à bulles et détecteur solide de traces nucléaires de type CR-39“. Radioprotection 39, Nr. 2 (April 2004): 189–203. http://dx.doi.org/10.1051/radiopro:2003026.
Der volle Inhalt der QuelleLECOMPTE, Y., G. GAGNA, F. ENTINE, X. MICHEL, A. CAZOULAT, H. HULOT, P. ANZIANI, H. DE CARBONNIÈRES und J. C. AMABILE. „Le Service de protection radiologique des armées et la surveillance de l’exposition externe et interne aux rayonnements ionisants“. Médecine et Armées Vol. 42 No. 5, Volume 42, Numéro 5 (01.12.2014): 395–404. http://dx.doi.org/10.17184/eac.7050.
Der volle Inhalt der QuelleBembidé, Célestine, Hako Touko Blaise Arnaud, Keambou Tiambo Christian, Sarah Osama, Moses Oguho, Chong-Yeon Cho, Robert A. Skilton und Djikeng Appolinaire. „Assessment of genetic diversity of native chicken (<i>Gallus gallus domesticus</i>) population in Central African Republic“. Journal of the Cameroon Academy of Sciences 20, Nr. 2 (29.05.2024): 153–65. http://dx.doi.org/10.4314/jcas.v20i2.5.
Der volle Inhalt der QuelleBOICHARD, D., Aurélien CAPITAN, Coralie DANCHIN-BURGE und Cécile GROHS. „Avant-propos : Anomalies génétiques“. INRA Productions Animales 29, Nr. 5 (09.01.2020): 293–96. http://dx.doi.org/10.20870/productions-animales.2016.29.5.2995.
Der volle Inhalt der QuelleDissertationen zum Thema "Détecteur de neutron"
Chen, Yonghao. „Characterization of the New Neutron Line at CERN-n_TOF and Study of the Neutron-induced Fission of 237Np“. Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS204/document.
Der volle Inhalt der QuelleThe neutron time-of-flight (n_TOF)facility at CERN is a unique worldwide pulsedneutron source to measure the nuclear data over thewidest energy range with two beam lines currentlyexploited. One is horizontal with a ~185 metersflight path, sending neutrons to experimental area-1(EAR-1). The second one is a new line sendingneutrons vertically to experimental area-2 (EAR-2)with a ~20 meters flight path.The first part of this PhD work is dedicated to thecharacterization of the beam (flux, geometricalprofile, energy spectrum) of the new EAR-2 neutronbeam, of the utmost importance for the experimentalproposals and analyses. An experiment was carriedout at EAR-2, based on PPAC detectors looking atfission of 235U, and the beam profile and neutronflux have been obtained for the entire availableenergy range (from thermal to 200 MeV).The second part of the thesis aims to study theneutron-induced fission of 237Np. 237Np isabundantly produced in present nuclear reactor andis one of the major long-lived components ofnuclear waste which can be considered as apotential target of incineration in fast neutronreactors. Consequently its neutron-induced fissioncross section has been measured at differentfacilities. However, significant discrepancies existbetween different experiments. Especially, therecent one performed at n_TOF in 2010 is about 6%higher by comparison to the evaluation data basedon previous experiments. Therefore an experimenthas been performed at n_TOF EAR-1 to measure itsfission cross section, in a configuration allowing anaccurate control of the detection efficiency, aimingto give a definite answer to the puzzle. In this work,we found that the efficiencies for different targetelements are different, even though they havesimilar thickness, reflecting the conditions ofelectrodeposition. After application of thisefficiency correction in the energy range from 1 to 5MeV, the newly extracted fission cross section is 2-3% lower compared with our previous measurementin 2010, however they are 3-4% higher than the
Stutz, Anne. „Conception par simulation et réalisation d'un détecteur d'antineutrons“. Grenoble 1, 1989. http://www.theses.fr/1989GRE10084.
Der volle Inhalt der QuelleLynde, Clément. „Développement d'un imageur neutron portable“. Thesis, Strasbourg, 2019. http://www.theses.fr/2019STRAE006/document.
Der volle Inhalt der QuelleThe subject of the thesis aims at developing a portable neutron imager with detection performance compatible with the needs of the nuclear research and industry, in particular those of decommissioning. This thesis is divided into three main areas of research, preceded by a bibliographic research phase. Following the latter, the localization approach adopted is spatial encoding fast neutron imaging. Neutron detectors were studied and several choices adapted to this challenge were selected for the continuation of the study. The first axis is dedicated to the studies on the development of a position-sensitive neutron detector. The second axis is related to the design and prototyping of a portable neutron imager, based on a coded aperture and a Timepix detector enhanced with a paraffin layer. The last axis concerns the deployment and experimental characterization of this prototype
Lafont, Fabien. „Développement du détecteur d'électrons SECOND dédié à la mesure du temps de vie du neutron dans l'expérience HOPE“. Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAY065/document.
Der volle Inhalt der QuelleConsidering a low enough kinetic energy, a free neutron can be materially or magnetically trapped in a defined volume. This trapping allows experimenters to study the neutron and its characteristics, and in this case, to measure its mean lifetime. The HOPE experiment commissioned at Laue Langevin Institute in Grenoble is aimed at providing a 1 %- accuracy value. One way to measure lifetime is to record every single neutron beta decay occurring in the trap by counting the emitted electrons. The detector SECOND has been specifically designed to fulfill this goal within HOPE but also to discriminate other types of particles that induce false events. The latter argument is the reason for the two detection stages SECOND is composed of. The plastic scintillators phoswich constitutes the main part of the detector and has been successfully operated during preliminary tests at low temperature. The rejection rate of cosmic muons events is about 98 %, and this value can be drastically enhanced using a more suitable data acquisition system
Pantel, Denis. „Développement d’un détecteur de particules pour caractériser l’environnement radiatif stratosphérique et évaluer sa contrainte sur la microélectronique“. Thesis, Montpellier 2, 2013. http://www.theses.fr/2013MON20213/document.
Der volle Inhalt der QuelleWe developed an integrated silicon detector to be embedded in a stratospheric balloon in order to investigate the radiative atmospheric environment. The detector was calibrated with a Californium source, and it was fully characterized under neutron beams which produced various secondary ionizing particles. Differential detection cross sections for different neutron beam energies were shown to be in good agreement with simulations performed with the MC-Oracle code. We performed four stratospheric balloon flights (with ESA and CNES) and confirmed the correlation between the count rate and the altitude. Moreover, we observed that the radiative environment is not isotropic and demonstrated the potential of our tool for investigating the radiative atmospheric environment. These results are useful for estimating the particle flux that affects electronic devices and onboard aircraft systems
Vellettaz, Nicolas. „Optimisation d'un détecteur gazeux à micro-pistes destiné à la localisation à deux dimensions des neutrons thermiques“. Université Joseph Fourier (Grenoble), 1997. http://www.theses.fr/1997GRE10091.
Der volle Inhalt der QuelleMarquet, Christine. „Etude des composantes neutron et gamma du bruit de fond de la décroissance ββ(0ν) dans le détecteur prototype NEMO2 : implicatons pour le détecteur NEMO3“. Bordeaux 1, 1999. http://www.theses.fr/1999BOR10532.
Der volle Inhalt der QuelleVayre, Sylvain. „Développement et caractérisation d’une cible active scintillante pour l’étude de la fission et étude des possibilités de calorimétrie de la fission avec le détecteur CARMEN“. Thesis, Paris 11, 2015. http://www.theses.fr/2015PA112037/document.
Der volle Inhalt der QuelleStill, the nuclear fission process and the de-excitation of the fission fragments is not fully understood. Current theoretical models can not predict and explain correctly every experimentally observed correlations, and new correlated data upon neutron emission, gamma-ray emission and kinetic energy of the fission fragments are needed. In this context, coincident use of a fission fragment detector and the CARMEN detector would provide compelling data for these models by measuring both neutron multiplicity, total gamma-ray energy, total kinetic energy and possibly total neutron energy. The work presented here consists in developing a fission fragment detector and using it together with CARMEN in order to perform fission calorimetry measurements. Initially, we developed a new detector for fission studies whose principle is dissolving the actinide of choice into an organic liquid scintillator. Monte Carlo simulations and neutron induced experiments were used to fully characterize its performances and shown it can be used as a fission trigger for various measurements, such as fission cross section or spontaneous fission rate measurements, and used as a fission veto. The second part of this work was dedicated to the study of CARMEN’s ability to measure the total gamma-ray energy and total neutron energy released in fission. For this purpose, lab characterization of the detector’s performances and Monte Carlo simulation and analysis of its “prompt” response to neutrons and gamma-rays were performed
Chatry, Christian. „Contribution à la dosimétrie des neutrons rapides par l'analyse des traces de protons de recul dans un détecteur solide de traces polymétrique de type CR-39“. Montpellier 2, 1991. http://www.theses.fr/1991MON20101.
Der volle Inhalt der QuelleBlondel, Sophie. „Optimisation du blindage contre les neutrons pour le démonstrateur de SuperNEMO et analyse de la double désintégration β du néodyme-150 vers les états excités du samarium-150 avec le détecteur NEMO 3“. Phd thesis, Université Paris Sud - Paris XI, 2013. http://tel.archives-ouvertes.fr/tel-00855279.
Der volle Inhalt der QuelleBuchteile zum Thema "Détecteur de neutron"
BOLLINI, D., A. BUHLER-BROGLIN, P. DALPIAZ, T. MASSAM, F. NAVACH, F. L. NAVARRIA, M. A. SCHNEEGANS und A. ZICHICHI. „UN DÉTECTEUR DE NEUTRONS POUR LA SPECTROMÉTRIE DE MASSES MANQUANTES“. In World Scientific Series in 20th Century Physics, 193–96. WORLD SCIENTIFIC, 2002. http://dx.doi.org/10.1142/9789812776389_0014.
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