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Author: FABIEN.. HOELLINGER
Publisher:
ISBN:
Category :
Languages : fr
Pages : 132
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Book Description
DEUX EXPERIENCES REALISEES AVEC LE MULTIDETECTEUR EUROGAM II ONT PERMIS D'ETUDIER LA STRUCTURE NUCLEAIRE JUSQU'A DES MOMENT ANGULAIRES MOYENS ( 20 H) DE NOYAUX RICHES EN NEUTRONS. LA PREMIERE ETUDE CONSISTAIT EN L'ANALYSE DES PRODUITS DE LA FISSION SPONTANEE DU #2#4#8CM. TROIS ISOTOPES DE CERIUM TRES RICHES EN NEUTRONS #1#4#7#,#1#4#9#,#1#5#1CE ONT FAIT L'OBJET DE NOS INVESTIGATIONS. UN SCHEMA DE NIVEAUX DU #1#5#1CE A ETE ETABLI POUR LA PREMIERE FOIS. LA STRUCTURE YRAST DE CES TROIS NOYAUX APPARTENANT A UNE REGION DE LA CARTE DES NUCLEONS OU UNE FORTE SUSCEPTIBILITE OCTUPOLAIRE EST ATTENDUE NE DEVOILE PAS DE BANDES A PARITE ALTERNEE. L'ETUDE DE LA STRUCTURE DES BANDES ROTATIONNELLES A ETE ENTREPRISE ET A PERMIS DE SUGGERER UNE CONFIGURATION DE NILSSON A CERTAINES BANDES. LA DEUXIEME EXPERIENCE AVAIT POUR BUT L'ETUDE DES NOYAUX #9#9MO, #1#0#1TC ET #1#0#3RU SITUES DU COTE RICHE EN NEUTRONS PAR RAPPORT A LA LIGNE DE STABILITE. CES NOYAUX SONT PRODUITS COMME FRAGMENTS DE FISSION DANS UNE REACTION INDUITE PAR IONS LOURDS. CERTAINES BANDES ONT ETE PROLONGEES A PLUS HAUT SPIN ET DE NOUVELLES BANDES ONT ETE MISES EN EVIDENCE. LA STRUCTURE DES BANDES ROTATIONNELLES A ETE INTERPRETEE A L'AIDE D'UN MODELE HARTREE-FOCK-BOGOLUYBOV. UNE DERNIERE EXPERIENCE AYANT POUR BUT L'ETUDE DE LA STRUCTURE DU #2#2#3PA, NOYAU RICHE EN PROTON, A ETE EFFECTUEE A L'AIDE DE L'ENSEMBLE JURO+RITU INSTALLE A JYVASKYLA (FINLANDE). LA REGION DES ACTINIDES RICHES EN PROTONS CONSTITUE UN ILOT DE NOYAUX A DEFORMATION OCTUPOLAIRE CENTRE AUTOUR DE Z88, N132. L'ANALYSE NOUS A PERMIS DE METTRE EN EVIDENCE POUR LA PREMIERE FOIS DES TRANSITIONS ELECTROMAGNETIQUES APPARTENANT A CE NOYAU.
Author: FABIEN.. HOELLINGER
Publisher:
ISBN:
Category :
Languages : fr
Pages : 132
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Book Description
DEUX EXPERIENCES REALISEES AVEC LE MULTIDETECTEUR EUROGAM II ONT PERMIS D'ETUDIER LA STRUCTURE NUCLEAIRE JUSQU'A DES MOMENT ANGULAIRES MOYENS ( 20 H) DE NOYAUX RICHES EN NEUTRONS. LA PREMIERE ETUDE CONSISTAIT EN L'ANALYSE DES PRODUITS DE LA FISSION SPONTANEE DU #2#4#8CM. TROIS ISOTOPES DE CERIUM TRES RICHES EN NEUTRONS #1#4#7#,#1#4#9#,#1#5#1CE ONT FAIT L'OBJET DE NOS INVESTIGATIONS. UN SCHEMA DE NIVEAUX DU #1#5#1CE A ETE ETABLI POUR LA PREMIERE FOIS. LA STRUCTURE YRAST DE CES TROIS NOYAUX APPARTENANT A UNE REGION DE LA CARTE DES NUCLEONS OU UNE FORTE SUSCEPTIBILITE OCTUPOLAIRE EST ATTENDUE NE DEVOILE PAS DE BANDES A PARITE ALTERNEE. L'ETUDE DE LA STRUCTURE DES BANDES ROTATIONNELLES A ETE ENTREPRISE ET A PERMIS DE SUGGERER UNE CONFIGURATION DE NILSSON A CERTAINES BANDES. LA DEUXIEME EXPERIENCE AVAIT POUR BUT L'ETUDE DES NOYAUX #9#9MO, #1#0#1TC ET #1#0#3RU SITUES DU COTE RICHE EN NEUTRONS PAR RAPPORT A LA LIGNE DE STABILITE. CES NOYAUX SONT PRODUITS COMME FRAGMENTS DE FISSION DANS UNE REACTION INDUITE PAR IONS LOURDS. CERTAINES BANDES ONT ETE PROLONGEES A PLUS HAUT SPIN ET DE NOUVELLES BANDES ONT ETE MISES EN EVIDENCE. LA STRUCTURE DES BANDES ROTATIONNELLES A ETE INTERPRETEE A L'AIDE D'UN MODELE HARTREE-FOCK-BOGOLUYBOV. UNE DERNIERE EXPERIENCE AYANT POUR BUT L'ETUDE DE LA STRUCTURE DU #2#2#3PA, NOYAU RICHE EN PROTON, A ETE EFFECTUEE A L'AIDE DE L'ENSEMBLE JURO+RITU INSTALLE A JYVASKYLA (FINLANDE). LA REGION DES ACTINIDES RICHES EN PROTONS CONSTITUE UN ILOT DE NOYAUX A DEFORMATION OCTUPOLAIRE CENTRE AUTOUR DE Z88, N132. L'ANALYSE NOUS A PERMIS DE METTRE EN EVIDENCE POUR LA PREMIERE FOIS DES TRANSITIONS ELECTROMAGNETIQUES APPARTENANT A CE NOYAU.
Author: Jean-Paul Blaizot
Publisher: Mit Press
ISBN: 9780262022149
Category : Science
Languages : en
Pages : 657
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Book Description
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.
Author: Nicolas Schunck
Publisher: Iph001
ISBN: 9780750314237
Category : Science
Languages : en
Pages : 0
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Book Description
Energy density functional (EDF) approaches have become over the past twenty years a powerful framework to study the structure and reactions of atomic nuclei. This book gives an updated presentation of non-relativistic and covariant energy functionals, single- and multi-reference methods, and techniques to describe small- and large-amplitude collective motion or nuclei at high excitation energy. Edited by an expert in energy density functional theory, Dr Nicolas Schunck, alongside several experts within the field, this book provides a comprehensive and informative exploration of EDF methods. Detailed derivations, practical approaches, examples and figures are used throughout the book to give a coherent narrative of topics that have hitherto rarely been covered together.
Author: World Bank
Publisher: World Bank Publications
ISBN: 0821385631
Category : Social Science
Languages : en
Pages : 114
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Book Description
This report provides the most comprehensive and rigorous analysis of Iraqi income and expenditure in several decades. The report makes extensive use of the Iraq Household Socio-Economic Survey, the first nationwide income and expenditure survey since 1988. IHSES data is complemented income and expenditure data from a wide range of other measures of living standards, allowing us to analyze living standards in a holistic way. The analysis presented here was performed with two main goals first, to inform the Government s Poverty Reduction Strategy; and second, to serve as a baseline for future assessments of changes in living standards and the identification of critical issues for deeper examination. Iraqi living standards have two unusual characteristics. First, they have fallen over the past generation. Second, they feature surprisingly little inequality. These characteristics are both rooted in Iraq s recent history of authoritarian government, war, military occupation, insurgency, and civil strife leading to infrastructure destruction and population displacement. There have been few opportunities for individuals to prosper from professional or entrepreneurial activities. Decades of neglected investment have resulted in deterioration of social services and economic infrastructure. Consequently, individuals have lacked capabilities to prosper and an investment climate conducive to prosperity. School enrollment and life expectancy have declined. Extremely low returns to education reflect the combination of poor educational quality and lack of employment opportunities. In terms of economic infrastructure, access to reliable electricity and water, and even access to paved roads are low, are further reflections of decades of neglect. While the upper end of the distribution has been pulled down by a lack of opportunities, the lower end has been supported by direct government provision of food. The Public Distribution System (PDS) provides 85 percent of food needs. While PDS has been useful as a safety net for the poor and the vulnerable, the system is expensive, inefficient, and fiscally risky. Indeed, PDS food rations account for a far greater share of public spending than does education or health. Going forward, Iraq faces two main challenges. First, although Iraq does not have to develop from scratch, it faces a formidable challenge in re-development. Second, a shift by the Government is required from direct provision of basic subsistence toward investment in human capacities. The Government can provide an enabling environment through investments in economic infrastructure and services to business and citizens, thus allowing the population to make productive use of education and their own labor. Both challenges are now being taken up by the Poverty Reduction Strategy, which articulates a detailed set of required actions and outlines priorities for government spending.
Author: Christine Parent
Publisher: Springer Science & Business Media
ISBN: 354030326X
Category : Computers
Languages : en
Pages : 475
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Book Description
From environmental management to land planning and geo-marketing, the number of application domains that may greatly benefit from using data enriched with spatio-temporal features is expanding very rapidly. This book shows that a conceptual design approach for spatio-temporal databases is both feasible and easy to apprehend. While providing a firm basis through extensive discussion of traditional data modeling concepts, the major focus of the book is on modeling spatial and temporal information.
