We use projected shell model to study superdeformed phenomena in the Zn isotopes, including 60Zn¡Ð68Zn. The calculating kinetic moment of inertia J(1) and dynamic moment of inertia J(2) compare with experimental values are very well. It is found that alignment of g9/2 proton and neutron pair determines the high spin behavior for superdeformed rotational bands in this mass region. A comparison of the J(2) in even-odd nuclei that neutron-proton pairing correlations may be present.

We use projected shell model to study the superdeformed phenomena in the Pr isotopes ,including 129Pr¡B131Pr¡B133Pr¡B135Pr. The calculating kinetic moment of inertia J(1) and dynamic moment of inertia J(2) compare with the experimental values are very well. We can find that there is no a obvious peak appearing in the dynamic moments of inertia diagrams in even-odd nuclei. The phenomena have been interpreted that have no a crossing of the s _band with the g_band .

none

Abstract We apply PSM(projected shell model) to superdeformed phenomena in the Eu isotopes, 143Eu ~ 147Eu odd mass included. In calculating kinetic moment of inertia J(1) and dynamic moment of inertia J(2), comparing with experimental values, we realize the basic property and structure of the nuclear. As a result, we find that the uncertain spin I in 143Eu shifts several . Therefore, the experimental values quite correspond to the theoretical values. In theory, we find there are different superdeformed phenomena in 147Eu.

Abstract The Projected Shell Model has been applied to the Isotones even (odd -odd) mass nuclei La; odd (odd - even)mass Ce, and odd (odd - even)mass Nd nuclei, to investigate the high-spin superdeformed phenomena. The theoretical calculated transition energy E£^, kinetic moment of inertia J(1) ,and dynamic moment of inertia J(2) are compared with experimental data. High-spin superdeformed nuclei behave like rigidbody ,the physical meaning .show a large gap at N=73¡BZ=58 and Z=60.

We introduce the process of the development in the Nuclear Structure Model, the Quantum Theory of the Projected Shell Model and the improvement of the calculating program. Besides we deal with the high-spin superdeformed phenomena. By using the PSM_EO program, the Projected Shell Model is applied to the odd (even-odd) mass nuclei Tb , including 145Tb ,147Tb ,149Tb and 151Tb . The results of theoretical calculations about the transition energy E£^, kinetic moment of inertia J(1) and dynamic moment of inertia J(2) are compared with experimental data to verify the meaning in Physics.

Le noyau atomique peut adopter, à haut moment angulaire, une forme très allongée de rapport d'axes 2 :1 : c'est le phénomène de superdéformation. Si aujourd'hui plus de 300 bandes super déformées ont été identifiées, l'assignation des énergies, spins et parités des états associés n'a pu être effectuée que pour un dixième de ces bandes. Cette assignation ne peut se faire que par la mesure de transitions gamma discrètes reliant les états super déformés (sd) aux états normalement déformés (nd).<br /><br />Dans le cadre de ce travail de thèse, nous nous sommes intéressés au noyau $^{192}$hg, prédit doublement magique dans son état sd et donc noyau de référence de la région de masse a~190. Une expérience a été menée auprès du multidétecteur Euroball IV à Strasbourg dans le but de mesurer les observables e*, i, $\pi$ des états sd de ce noyau.<br /><br /> La recherche des transitions de lien direct s'est avérée à la limite des capacités d'observation des multi détecteurs actuels, utilisant des boucliers anti-Compton. La prochaine génération de multidétecteur gamma abandonnera ces boucliers et utilisera des algorithmes de tracking gamma pour reconstruire les trajectoires des photons.<br /><br /> La seconde partie de cette thèse a été axée sur un travail de R&D pour le projet européen Agata. Nous avons en particulier effectué des simulations au moyen du code Geant4 et essayé d'améliorer les algorithmes de tracking existants par la mise au point de méthodes de reconstruction des événements « création de paire ». Agata devrait voir le jour à l'horizon 2015-2020, et permettra ainsi de repousser les limites d'observation de deux ordres de grandeur environ.

Covariant density functional theory (CDFT) is a modern theoretical tool for the description of nuclear structure physics. Here different physical properties of the ground and excited states in atomic nuclei have been investigated within the CDFT framework employing three major classes of the state-of-the-art covariant energy density functionals. The global performance of CEDFs for even-even nuclei are investigated and the systematic theoretical uncertainties are estimated within the set of four CEDFs in known regions of the nuclear chart and their propagation towards the neutron drip line. Large-scale axial relativistic Hartree-Bogoliubov (RHB) calculations are performed for even-even nuclei to calculate different ground state observabvles. The predictions for the two-neutron drip line are also compared in a systematic way with the non-relativistic results. CDFT has been applied for systematic study of extremely deformed, rotating N ∼ Z nuclei of the A ∼ 40 mass region. At spin zero such structures are located at high energies which prevents their experimental observation. The rotation acts as a tool to bring these exotic shapes down to the yrast line so that their observation could become possible with a future generation detectors such as GRETA or AGATA. The major physical observables of such structures, the underlying single-particle structure and the spins at which they become yrast or near yrast are defined. The search for the fingerprints of clusterization and molecular structures is performed and the configurations with such features are discussed. CDFT has been applied to study fission barriers of superheavy nuclei and related systematic theoretical uncertainties in the predictions of inner fission barrier heights in superheavy elements. Systematic uncertainties are substantial in superheavy elements and their behavior as a function of proton and neutron numbers contains a large random component. The benchmarking of the functionals to the experimental data on fission barriers in the actinides allows reduction of the systematic theoretical uncertainties for the inner fission barriers of unknown superheavy elements. However, even then they on average increase when moving away from the region where benchmarking has been performed.