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Literatura académica sobre el tema "Irradiartion aux ions lourds"
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Artículos de revistas sobre el tema "Irradiartion aux ions lourds"
Eve, Sophie, Florent Moisy, Rosine Coq Germanicus, Clara Grygiel, Eric Hug y Isabelle Monnet. "Caractérisation par nanoindentation du GaN irradié par des ions uranium de grande énergie". Matériaux & Techniques 105, n.º 1 (2017): 108. http://dx.doi.org/10.1051/mattech/2017008.
Texto completo-Lorfevre, E. "Simulation numérique et durcissement de composants de puissance aux défaillances induites par ions lourds". Revue de l'Electricité et de l'Electronique -, n.º 10 (1997): 79. http://dx.doi.org/10.3845/ree.1997.131.
Texto completoAdorni-Braccesi, A., M. Acutis, S. Merlo y G. M. Zuppi. "Application des techniques physiques, géochimiques et isotopiques pour l'évaluation de l'infiltration sous climat tempéré". Revue des sciences de l'eau 14, n.º 3 (12 de abril de 2005): 243–63. http://dx.doi.org/10.7202/705419ar.
Texto completoTesis sobre el tema "Irradiartion aux ions lourds"
Dujarrier, Alexis. "Effet de la micrοstructure οbtenue par fabricatiοn additive sur le vieillissement sοus irradiatiοn d'alliages ΝΙ-20CR". Electronic Thesis or Diss., Normandie, 2024. http://www.theses.fr/2024NORMC231.
Texto completoAdditive Manufacturing (AM) of metals is an advanced technology that enables rapid implementation and design optimization of complex parts. It is now used in many industrial sectors, including nuclear. One of the most common processes in AM is Laser Powder Bed Fusion, which results in a particular microstructure that could influence the material's response to irradiation. The objective of this thesis was to study the effect of heavy ion irradiation on the microstructure of AM Ni-20Cr using Transmission Electron Microscopy (TEM), as well as its impact on its mechanical properties, to determine whether AM could be used for nuclear applications. For this purpose, three additive manufacturing strategies and the effect of annealing were studied and compared to a reference material. Various heavy ion irradiation experiments were conducted, on bulk samples as well as on thin foils observed via in situ TEM. In situ experiments allow measuring the defect growth kinetics at low doses and tracking the evolution of certain characteristics.It is thus demonstrated that in all samples, irradiation induces the formation of Frank loops and perfect loops. The manufacturing strategy does not influence the microstructure evolution of AM samples. However, the dendritic cells, characteristic of AM, are dissolved under irradiation. Additionally, a lower density of dislocation loops is measured in the AM samples compared to the annealed and reference samples that show a similar evolution. This is explained by a higher density of defect sinks in the as built AM material. The observed microstructural evolution is linked to the mechanical properties, which are measured by micropillar compression. It is shown that the annealed and reference materials experience an increase in their critical resolved shear stress due to the creation of dislocation loops, whereas the AM material show a decrease due to the dissolution of dislocation cells, superior to the hardening component. These changes are confirmed by the application of the dispersed barrier-hardening model
Provost-Grellier, Antoine. "Test aux ions lourds de VLSI programmables". Grenoble INPG, 1989. http://tel.archives-ouvertes.fr/tel-00334460.
Texto completoProvost-Grellier, Antoine Velazco Raoul. "Test aux ions lourds de VLSI programmables". S.l. : Université Grenoble 1, 2008. http://tel.archives-ouvertes.fr/tel-00334460.
Texto completoHamrita, Hassen. "Réponse en courant des détecteurs silicium aux particules chargées et aux ions lourds". Phd thesis, Université Pierre et Marie Curie - Paris VI, 2005. http://tel.archives-ouvertes.fr/tel-00010145.
Texto completoVu, Thi Hai Yen. "Simulation du Comportement sous Irradiation aux Ions Lourds du Nanocomposite Au-SiO2". Palaiseau, Ecole polytechnique, 2015. https://tel.archives-ouvertes.fr/tel-01265991/document.
Texto completoMetal-glass nanocomposites are interesting owing to their particular optical-properties. Ion irradiation can be used as a tool to fabricate nanocomposites. The aim of this thesis was to study, from a fundamental point of view, the behavior of gold nanoparticles (NPs) embedded in an amorphous silica matrix under irradiation. My contribution consists in the interpretation, by modeling and numerical simulation, of experimental results previously obtained by researchers of the Laboratoire des Solides Irradiés. In a first type of experiments, the system was irradiated with 4 MeV gold ions while in a second type the irradiation was performed by using 74 MeV krypton ions. For the study of the first type of experiments, the simulation by kinetic Monte Carlo (KMC) on rigid lattice was chosen and developed specifically to study the behavior of NPs irradiated at different temperatures. The simulations allows us to reproduce qualitatively the experimental results at any temperature. We found that the system evolves within a direct coarsening regime at high temperature (T>900 K) whereas at low temperatures (T<600 K) it becomes resistant to coarsening and the NPs dissolve. A transition regime is observed between 600 K and 900 K. The KMC simulation highlights and explains an effect of the size of the NPs on their dissolution under irradiation. It also demonstrated that unidirectional ballistic models could account for the law of dissolution. A model based on the theoretical approach of Frost and Russel including a size-dependent recoil generation rate fully describes the dissolution for any NP size. In the second type, the system evolves in the electronic energy deposition regime. Depending on their size, the NP can be vaporized (diameter<10 nm), transformed into nanorod (10-30 nm) or faceted NP (30-60 nm) or slightly deformed (>60 nm) by the incident ions. We imagined a scenario for the mechanism of deformation which is based on the thermal expansion of the melted NP into the track produced by the incident ion in the matrix. Its implementation using a new simulation technique helped to refine certain elements of the scenario and to improve the overall understanding of the process. The qualitative agreement between the experimental data and the results obtained by the simulation validate the proposed mechanism
Vinet, Loïc. "Approche semi-classique de la physique des ions lourds aux énergies intermédiaires". Paris 11, 1986. http://www.theses.fr/1986PA112199.
Texto completoThe study of heavy ion collisions at intermediate energies (10 to 100 MeV/A), can be undertaken by a semi-classical approach: the nuclear Vlasov equation. It is possible to decompose the one body distribution function over a suitable coherent state basis for dynamical studies. This method is applied for colliding slabs, and the results are compared with those of TDHF. With imposed spherica1 symmetry, the isoscalar monopole resonance, evaporation, formation of bubble nuclei and total evaporation, are obtained. The extension to three dimensions and to the Landau-Vlasov equation through the residual interaction included in the Uehling-Uhlenbeck collision term permits a general study of the dynamical instability of highly excited nuclei. The application to heavy ion collisions gives a description of bath the main mechanisms of reaction, and the ineffective fusion for the system 40Ar (35 MeV/A) + 27Al. Alpha particle multiplicities in correlation with evaporated residues in the experience 40Ar (27 MeV/A) +27Al, have been extracted. From theoretical results, different scenario are proposed (entrance channel limitation and exit channel disintegration), in order to explain the disappearance of the fusion component observed for this system at energies above 32 MeV/A
Vinet, Loïc. "Approche semi-classique de la physique des ions lourds aux énergies intermédiaires". Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb37601731t.
Texto completoBouillaud, Pascal. "Irradiation aux ions lourds de films minces nanocristallins d'alliages FeCo et FeAl". Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb37612171v.
Texto completoBlumenfeld, Yorick. "Collisions périphériques d'ions lourds induites par ⁴⁰ Ar aux énergies intermédiaires : résonances géantes, structures à haute énergie et fragmentation du projectile". Paris 11, 1987. http://www.theses.fr/1987PA112405.
Texto completoThis work concerns the study of peripheral heavy ion reactions induced by 40Ar beams at intermediate energies. The results obtained ln similar studies at low incident energies are first of all reviewed. The time of flight spectrometer built for the experiments is then described. It performances allow an excellent charge and mass separation of the reaction products and a good energy resolution. A study of the properties of the projectile-like fragments shows numerous deviations from the relativistic energy fragmentation modal. Evidence for a strong surface transfer reaction component is given and the persistence of mean field affects at Intermediate energies is stressed. A calculation of the contribution of the transfer evaporation mechanism to the inelastic spectra shows that this mechanism is responsible for the major part of the background measured at high excitation energy and can in same cases induce narrow structures in the spectra. The inelastic spectra show a strong excitation of the giant quadrupole resonance. In the region between 20 and 80 MeV excitation energy narrow structures are present for all the studied systems. Statistical and Fourier analyses allow to quantify the probabilities of existence, the widths and the excitation energies of these structures. A transfer evaporation hypothesis cannot consistently reproduce all the observed structures. The excitation energies of the structures can be well described by phenomenological laws where the energies are proportional to the -113 power of the target mass. Complete calculations of the excitation probabilities of giant resonances and multiphonon states are performed within a modal where the nuclear excitation is calculated microscopically ln the Random Phase Approximation. It is shown that a possible Interpretation of the structures is the excitation of multiphonon states built with 2+ giant resonances
Tisserand, Raphaël. "Caractérisation de l'endommagement de matériaux apatitiques irradiés aux ions lourds et recuits thermiquement". Phd thesis, Université de Franche-Comté, 2004. http://tel.archives-ouvertes.fr/tel-00008573.
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