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Mise En Evidence De Bandes Dipolaires Dans Les Isotopes De Mercure A Laide Du Multidetecteur Eurogam
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Book Synopsis Mise en évidence de bandes dipolaires dans les isotopes de mercure à l'aide du multidétecteur EUROGAM by : Yves Le Coz
Download or read book Mise en évidence de bandes dipolaires dans les isotopes de mercure à l'aide du multidétecteur EUROGAM written by Yves Le Coz and published by . This book was released on 1995 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt: CE TRAVAIL DE THESE PORTE SUR L'ETUDE DE LA STRUCTURE NUCLEAIRE DES NOYAUX DE MASSE A=190 ET PLUS PARTICULIEREMENT SUR LA RECHERCHE DES BANDES ROTATIONNELLES DIPOLAIRES DANS LES NOYAUX DE MERCURE. L'ETUDE EXPERIMENTALE DE CES NOYAUX A ETE REALISEE AUPRES DU MULTIDETECTEUR EUROGAM PHASE I. LES NOYAUX #1#9#2HG ET #1#9#3HG ONT ETE PRODUITS VIA LES REACTIONS DE FUSION-EVAPORATION #1#6#0GD(#3#6S, 4N)#1#9#2HG, #1#5#0ND(#4#8CA, 5N)#1#9#3HG A DES ENERGIES DE FAISCEAU RESPECTIVES DE 159 ET 213 MEV. CES EXPERIENCES ONT PERMIS D'ETENDRE LE SCHEMA DE NIVEAUX DE CES NOYAUX JUSQU'A PLUS DE 10 MEV D'ENERGIE D'EXCITATION ET PRES DE 35 DE MOMENT ANGULAIRE. DANS LE NOYAU #1#9#2HG, DEUX BANDES DIPOLAIRES ONT AINSI ETE IDENTIFIEES. CES DEUX NOUVELLES STRUCTURES, AINSI QUE DEUX STRUCTURES SIMILAIRES DU NOYAU #1#9#3HG, ONT ETE RELIEES AUX ETATS DE BASSE ENERGIE. LA DECOUVERTE, POUR LA PREMIERE FOIS DANS LA SERIE ISOTOPIQUE DES MERCURES, DE TRANSITIONS DE LIEN ENTRE BANDES DIPOLAIRES ET ETATS NORMAUX PERMET AINSI DE CONNAITRE L'ENERGIE D'EXCITATION ET LES SPINS DE CES STRUCTURES. DES ANALYSES DE DISTRIBUTION ET CORRELATION ANGULAIRE, SPECIFIQUES A LA GEOMETRIE D'EUROGAM PHASE I, ONT PERMIS D'ASSIGNER LA MULTIPOLARITE DE CES STRUCTURES. APRES UNE DISCUSSION GENERALE DES BANDES DIPOLAIRES DE LA REGION DE MASSE A=190, UNE INTERPRETATION DE CES BANDES DANS #1#9#2#,#1#9#3HG, EN TERME DE MODELE UNIFIE DE COUPLAGE FORT UTILISANT DES FONCTIONS D'ONDE INDIVIDUELLES EXTRAITES DE CALCULS DE CHAMP MOYEN HARTREE-FOCK + BCS, EST PROPOSEE ET MONTRE L'IMPORTANCE DES EXCITATIONS DE PROTONS DE HAUT-K DANS CES BANDES DIPOLAIRES, EXCITATIONS QUI STABILISENT LE NOYAU DANS UNE FORME FAIBLEMENT APLATIE
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1996 with total page 960 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Quantum Theory of Finite Systems by : Jean-Paul Blaizot
Download or read book Quantum Theory of Finite Systems written by Jean-Paul Blaizot and published by Mit Press. This book was released on 1986 with total page 657 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive and pedagogical account of the various methods used in the quantum theory of finite systems, including molecular, atomic, nuclear, and particle phenomena. Covering both background material and advanced topics and including nearly 200 problems, Quantum Theory of Finite Systems has been designed to serve primarily as a text and will also prove useful as a reference in research. The first of the book's four parts introduces the basic mathematical apparatus: second quantization, canonical transformations, Wick theorems and the resulting diagram expansions, and oscillator models. The second part presents mean field approximations and the recently developed path integral methods for the quantization of collective modes. Part three develops perturbation theory in terms of both time-dependent Feynman diagrams and time-independent Goldstone diagrams. A fourth part discusses variational methods based on correlated wavefunctions, including spin correlations. The approximation schemes are formulated for fermions and bosons at eigher zero or non-zero temperature. Although the formalism developed applies to both finite and infinite systems, the book stresses those aspects of the theory that are specific to the description of finite systems. Thus special attention is given to mean field approximations, the ensuing broken symmetries, and the associated collective motions such as rotations. Conversely, some specific features of systems with infinite numbers of degrees of freedom (such as the thermodynamic limit, critical phenomena, and the elimination of ultraviolet divergencies) are deliberately omitted. Jean-Paul Blaizot and Georges Ripka are associated with the Centre d'Etudes Nucleaires de Saclay.
