Download or read book ETUDE THEORIQUE DE LA DIFFUSION INELASTIQUE DES NEUTRONS PAR L EAU EN PHASE LIQUIDE written by Marc Diraison and published by . This book was released on 1994 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'ETUDE DE LA DYNAMIQUE DES LIQUIDES MOLECULAIRES PAR DIFFUSION INELASTIQUE DES NEUTRONS A RECEMMENT BENEFICIE DE L'APPORT DE LA TECHNOLOGIE DES SOURCES PAR SPALLATIONS. DES PROGRES EXPERIMENTAUX NOTABLES EN ONT RESULTE PERMETTANT DESORMAIS UNE ETUDE DETAILLEE DES MOUVEMENTS MOLECULAIRES. AFIN D'EXPLIQUER ET DE REPRODUIRE LES NOUVELLES DONNEES EXPERIMENTALES, NOUS AVONS DEVELOPPE UNE THEORIE DE LA DIFFUSION INELASTIQUE INCOHERENTE DE L'EAU EN PHASE LIQUIDE. NOUS AVONS PROCEDE EN TROIS ETAPES: TOUT D'ABORD, NOUS AVONS TRAITE ANALYTIQUEMENT ET QUANTIQUEMENT LES DEGRES DE LIBERTE DE VIBRATION DES MOLECULES D'EAU EN TENANT COMPTE DE L'EFFET DES MOLECULES ENVIRONNANTES SUR LES VIBRATEURS. NOUS AVONS ALORS EXPRIME LA SECTION EFFICACE DIFFERENTIELLE EN TERMES DE FONCTIONS DE CORRELATION NE DEPENDANT PLUS QUE DES DEGRES DE LIBERTE DE ROTATION-TRANSLATION. CES FONCTIONS DE CORRELATION ONT ETE CALCULEES ANALYTIQUEMENT ET SEMI-CLASSIQUEMENT EN TENANT COMPTE DE LA RELATIVE BRIEVETE DU TEMPS SUR LEQUEL MEME LES EXPERIENCES LES PLUS RECENTES SUIVENT LA DYNAMIQUE DES MOLECULES. LA COMPARAISON AVEC LES RESULTATS EXPERIMENTAUX PERMET DE DETERMINER L'AMPLITUDE MOYENNE DU PROTON DANS LES MODES DE LIBRATION, UNE QUANTITE DE PREMIERE IMPORTANCE POUR CARACTERISER LA DYNAMIQUE DU PROTON DANS LE RESEAU DES LIAISONS HYDROGENES. L'ACCORD AVEC L'EXPERIENCE EST BON. CES FONCTIONS DE CORRELATION ONT EGALEMENT ETE CALCULEES PAR SIMULATION DE DYNAMIQUE MOLECULAIRE DE MOLECULES RIGIDES PUIS CORRIGEES SEMI-CLASSIQUEMENT. CES SIMULATIONS ONT PERMIS DE VERIFIER LA VALIDITE DES HYPOTHESES UTILISEES DANS LE TRAITEMENT ANALYTIQUE. CONTRAIREMENT AUX PRECEDENTES ETUDES UTILISANT DES SIMULATIONS COMPLETEMENT CLASSIQUES DE MOLECULES D'EAU FLEXIBLES, LES SPECTRES NUMERIQUES OBTENUS A PARTIR DE L'APPROCHE MIXTE, QUANTIQUE-CLASSIQUE, QUE NOUS PROPOSONS SONT EN ACCORD AVEC LES DONNEES EXPERIMENTALES

Download or read book ETUDE PAR DIFFUSION INELASTIQUE COHERENTE DES NEUTRONS DES PHASES BASSE TEMPERATURE DU TEREPHTAL BIS BUTYL ANILINE TBBA written by P.. PORQUET and published by . This book was released on 1977 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: INTRODUCTION OU POLYMORPHISME DES CRISTAUX LIQUIDES ET RAPPEL DE THEORIE DE LA DIFFUSION DES NEUTRONS PAR LES CRISTAUX. DESCRIPTION DU SPECTROMETRE A TROIS AXES UTILISE. EXPOSE ET DISCUSSION DES RESULTATS EXPERIMENTAUX.

Download or read book tude par diffusion in lastique coh rente des neutrons des phases basse temp rature du terephtal bis butyl aniline TBBA written by Philippe Porquet and published by . This book was released on 1977 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book tude th orique des sections efficaces de diffusion lastique et in lastique des neutrons thermiques dans l hydrure de zirconium Approximation d Einstein written by Jacques Culambourg and published by . This book was released on 1961 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dans les piles à structure solide hétérogène, l'augmentation du rendement thermodynamique, liée à l'augmentation de température nécessitera l'emploi de matériaux spéciaux. Ces matériaux devront être peu absorbants et tenir à chaud leur rôle mécanique statique. Actuellement seuls remplissent ces conditions, outre le graphite, le zirconium et le béryllium. L'étude de la section efficace totale de diffusion des neutrons thermiques dans un composé hydrogéné de zirconium présente donc un grand intérêt. L'étude expérimentale a été menée au Centre d'Études Nucléaires de Saclay. Nous avons entrepris l'étude théorique en adoptant le modèle de l'oscillateur harmonique dans le cadre de l'approximation d'Einstein. Nous avons envisagé successivement le cas d'oscillateurs indépendants et le cas d'oscillateurs couplés. Les résultats ont été comparés à l'expérience.

Download or read book Contribution l tude de la diffusion in lastique des neutrons de 1 5 MeV written by and published by . This book was released on 1962 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Contribution l tude de la diffusion in lastique des neutrons de 1 5 MeV written by Dolly Szteinsznaider Abramson (Mme) and published by . This book was released on 1962 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Diffusion in lastique des neutrons pour l tude des excitations dans la mati re condens e written by Société française de la neutronique. Ecole thématique and published by . This book was released on 2010 with total page 649 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Journal de physique written by and published by . This book was released on 2005 with total page 830 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bulletin Signal tique written by Centre national de la recherche scientifique (France). Centre de documentation and published by . This book was released on 1962 with total page 758 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Gas cooled Nuclear Reactors written by France. Commissariat à l'énergie atomique and published by . This book was released on 2006 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Neutron Diffraction Studies written by C. G. Shull and published by . This book was released on 1949 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Applied Reactor Physics written by Alain Hébert and published by Presses inter Polytechnique. This book was released on 2009 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book From Microphysics to Macrophysics written by Roger Balian and published by Springer Science & Business Media. This book was released on 2007-06-26 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt: This popular, often cited text returns in a softcover edition to provide a thorough introduction to statistical physics and thermodynamics, and to exhibit the universal chain of ideas leading from the laws of microphysics to the macroscopic behaviour of matter. A wide range of applications illustrates the concepts, and many exercises reinforce understanding. Volume II applies statistical methods to systems governed by quantum effects, in particular to solid state physics, explaining properties due to the crystal structure or to the lattice excitations or to the electrons. The last chapters are devoted to non-equilibrium processes and to kinetic equations, with many applications included.

Download or read book Transport Theory written by James J. Duderstadt and published by John Wiley & Sons. This book was released on 1979 with total page 630 pages. Available in PDF, EPUB and Kindle. Book excerpt: Problems after each chapter

Download or read book Four Laws That Drive the Universe written by Peter Atkins and published by OUP Oxford. This book was released on 2007-09-06 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: The laws of thermodynamics drive everything that happens in the universe. From the sudden expansion of a cloud of gas to the cooling of hot metal, and from the unfurling of a leaf to the course of life itself - everything is directed and constrained by four simple laws. They establish fundamental concepts such as temperature and heat, and reveal the arrow of time and even the nature of energy itself. Peter Atkins' powerful and compelling introduction explains what the laws are and how they work, using accessible language and virtually no mathematics. Guiding the reader from the Zeroth Law to the Third Law, he introduces the fascinating concept of entropy, and how it not only explains why your desk tends to get messier, but also how its unstoppable rise constitutes the engine of the universe.

Download or read book Nuclear Computational Science written by Yousry Azmy and published by Springer Science & Business Media. This book was released on 2010-04-15 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nuclear engineering has undergone extensive progress over the years. In the past century, colossal developments have been made and with specific reference to the mathematical theory and computational science underlying this discipline, advances in areas such as high-order discretization methods, Krylov Methods and Iteration Acceleration have steadily grown. Nuclear Computational Science: A Century in Review addresses these topics and many more; topics which hold special ties to the first half of the century, and topics focused around the unique combination of nuclear engineering, computational science and mathematical theory. Comprising eight chapters, Nuclear Computational Science: A Century in Review incorporates a number of carefully selected issues representing a variety of problems, providing the reader with a wealth of information in both a clear and concise manner. The comprehensive nature of the coverage and the stature of the contributing authors combine to make this a unique landmark publication. Targeting the medium to advanced level academic, this book will appeal to researchers and students with an interest in the progression of mathematical theory and its application to nuclear computational science.

Download or read book The Physics of Nuclear Reactors written by Serge Marguet and published by Springer. This book was released on 2018-02-26 with total page 1462 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive volume offers readers a progressive and highly detailed introduction to the complex behavior of neutrons in general, and in the context of nuclear power generation. A compendium and handbook for nuclear engineers, a source of teaching material for academic lecturers as well as a graduate text for advanced students and other non-experts wishing to enter this field, it is based on the author’s teaching and research experience and his recognized expertise in nuclear safety. After recapping a number of points in nuclear physics, placing the theoretical notions in their historical context, the book successively reveals the latest quantitative theories concerning: • The slowing-down of neutrons in matter • The charged particles and electromagnetic rays • The calculation scheme, especially the simplification hypothesis • The concept of criticality based on chain reactions • The theory of homogeneous and heterogeneous reactors • The problem of self-shielding • The theory of the nuclear reflector, a subject largely ignored in literature • The computational methods in transport and diffusion theories Complemented by more than 400 bibliographical references, some of which are commented and annotated, and augmented by an appendix on the history of reactor physics at EDF (Electricité De France), this book is the most comprehensive and up-to-date introduction to and reference resource in neutronics and reactor theory.