Contribution à l'analyse d'une expérience de diffusion élastique et inélastique d'électrons de hautes énergies par les noyaux d'azote 14 et 15 PDF Download
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Author: Bruno Schweitz
Publisher:
ISBN:
Category :
Languages : fr
Pages : 118
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Author: Bruno Schweitz
Publisher:
ISBN:
Category :
Languages : fr
Pages : 118
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Author: Amina Zghiche
Publisher:
ISBN:
Category :
Languages : en
Pages : 201
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This thesis presents the results of the deep inelastic scattering cross section study on 2o8Pb. The measurement of these cross sections has been performed from 140 MeV to 645 MeV incident energy for these five values of the scattering angle : 35, 60, 75, 90 and 143 degrees. The quasi-elastic region has been entirely recovered by this measurement. We have performed the separation of the measured cross section in one longitudinal and one transverse structure functions with the Rosenbluth Diagram method after performing radiative corrections and corrections from the coulomb distortion effects, between 300 and 650 MeV/c for the effective momentum transfer and up to 350 MeV for the energy transfer.The transverse response function shows a disagreement with the independent particle models predictions. The contribution of the exchange currents and the pion electroproduction processes have not been estimated for 2o8Pb, but will make an explanation for the observed disagreement. The estimation of these processes for lighter nuclei has shown an agreement with the experimental results.The longitudinal response function disagrees also with classical models predictions. The explanation of the longitudinal response reduction in terms of nucleon-nucleon correlations is not satisfying since the strength is only pushed towards higher values of the energy transfer, and the resulting coulomb sum rule (integration over the quasi-elastic peak) still overestimating the experimental values. The particle-hole correlations in the Random Phase Approximation framework, do not improve the disagreement with the experiment. While the modification of the nucleon properties in the nuclear medium would be one better explanation of the result of our experiment.
Author: André Verdier
Publisher:
ISBN:
Category :
Languages : fr
Pages : 106
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REALISATION D'UN SPECTROMETRE MAGNETIQUE PERMETTANT L'ETUDE DE L'INTERACTION D'ELECTRONS LENTS (0 ET 2000 EV) AVEC LES SURFACES DES SOLIDES. LA SURFACE EST BOMBARDEE SOUS INCIDENCE QUASI-NORMALE; LES ELECTRONS EMIS SONT COLLECTES PAR UN OBJECTIF A IMMERSION QUI ELIMINE LES FAISCEAUX DIFFRACTES AUTRES QUE LE FAISCEAU 00. L'ETUDE DES PERTES D'ENERGIE CARACTERISTIQUES PERMET D'ETABLIR DEUX RESULTATS FONDAMENTAUX: D'UNE PART L'EPAISSEUR DE MATIERE INTERAGISSANT AVEC LES ELECTRONS INCIDENTS EST DE 8 A 10 COUCHES ATOMIQUES, D'AUTRE PART LE COUPLAGE ENTRE LA DIFFUSION ELASTIQUE ET LA DIFFUSION INELASTIQUE NE SEMBLE PAS POUVOIR ETRE DECRIT SIMPLEMENT DANS LE CAS DU GRAPHITE
![Contribution á l''etude de diffusion elastique [40]Ca ([16]O, [16]O) [40]Ca PDF](https://books.google.com/books/content/images/frontcover/CoIlOAAACAAJ?fife=w80-h100)
Author: Nicolas Alamanos
Publisher:
ISBN:
Category :
Languages : fr
Pages : 112
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Author: Alain Hébert
Publisher: Presses inter Polytechnique
ISBN: 2553014368
Category : Nuclear physics
Languages : en
Pages : 426
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Author: James J. Duderstadt
Publisher: John Wiley & Sons
ISBN:
Category : Science
Languages : en
Pages : 630
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Problems after each chapter
Author: Jacques Lafontaine
Publisher: Springer
ISBN: 3319207350
Category : Mathematics
Languages : en
Pages : 408
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Book Description
This book is an introduction to differential manifolds. It gives solid preliminaries for more advanced topics: Riemannian manifolds, differential topology, Lie theory. It presupposes little background: the reader is only expected to master basic differential calculus, and a little point-set topology. The book covers the main topics of differential geometry: manifolds, tangent space, vector fields, differential forms, Lie groups, and a few more sophisticated topics such as de Rham cohomology, degree theory and the Gauss-Bonnet theorem for surfaces. Its ambition is to give solid foundations. In particular, the introduction of “abstract” notions such as manifolds or differential forms is motivated via questions and examples from mathematics or theoretical physics. More than 150 exercises, some of them easy and classical, some others more sophisticated, will help the beginner as well as the more expert reader. Solutions are provided for most of them. The book should be of interest to various readers: undergraduate and graduate students for a first contact to differential manifolds, mathematicians from other fields and physicists who wish to acquire some feeling about this beautiful theory. The original French text Introduction aux variétés différentielles has been a best-seller in its category in France for many years. Jacques Lafontaine was successively assistant Professor at Paris Diderot University and Professor at the University of Montpellier, where he is presently emeritus. His main research interests are Riemannian and pseudo-Riemannian geometry, including some aspects of mathematical relativity. Besides his personal research articles, he was involved in several textbooks and research monographs.
Author: P. M. Banks
Publisher: Elsevier
ISBN: 1483260666
Category : Science
Languages : en
Pages : 445
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Aeronomy, Part A is an attempt to make a comprehensive exposition of the processes in aeronomy, the study of composition, movement, and thermal balance of the upper regions of the planetary atmosphere. The text covers topics such as atmospheric regions and atmospheric density, the temperature and molecular mass of the atmosphere; the permanent constituents and the molecular and isotonic composition of the homosphere; and the transition from the homosphere to the heterosphere. Also covered are topics such as the temperature gradient and energies in the thermosphere, conditions at 200km and above 250km, solar radiation and ionization, and aeronomic reactions. The book is recommended for scientists, especially natural physicists, who would like to know more about the field of aeronomy and its advances.
Author: Yousry Azmy
Publisher: Springer Science & Business Media
ISBN: 9048134110
Category : Technology & Engineering
Languages : en
Pages : 476
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Book Description
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.
Author:
Publisher:
ISBN:
Category : Nuclear physics
Languages : en
Pages : 172
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