Objectif The object of the present proposal is the study of the intriguing phenomenon of shape coexistence, whereby an atomic nucleus exhibits different shapes (e.g. spherical, oblate, prolate) at low excitation energy. The measurements will give quantitative information about the nature of the shape coexistence and the interplay between single-nucleon and collective degrees of freedom and should, therefore, reveal important new insight in the underlying mechanisms that determine the nuclear structure. The study will focus on neutron-deficient polonium isotopes, a critical region of the nuclide-chart to tests coherent descriptions of shape coexistence. The study will be achieved via Coulomb excitation experiments using state-of-the-art beams from CERN’s isotope separator on-line facility ISOLDE and the highly segmented germanium detector array MINIBALL. A quantitative analysis of the configuration mixing in the wave-functions will be deduced from the measurements of the transition matrix elements between low-lying excited states. The data will be combined with other experimental observables (mean square charge radii, magnetic moments, alpha- and beta-decay transition probabilities, level structures) and compared with contemporary theoretical predictions (mean-field and shell-model calculations and symmetry-based approaches). Through the present proposal the candidate will have the unique opportunity to receive high-level training in: radioactive nuclei production via the ISOL method, laser resonant ionization, gamma-ray spectroscopy with highly segmented germanium detectors and nuclear structure properties in heavy nuclei. This will allow the candidate to extend and deepen her research skills to the field of radioactive nuclei, today one of the major nuclear research field. Qualified researchers are extremely needed in the existing and planned Radioactive Ion Beam facilities. Champ scientifique natural sciencesphysical sciencesatomic physics Programme(s) FP7-PEOPLE - Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013) Thème(s) FP7-PEOPLE-2009-IEF - Marie Curie Action: "Intra-European Fellowships for Career Development" Appel à propositions FP7-PEOPLE-2009-IEF Voir d’autres projets de cet appel Régime de financement MC-IEF - Intra-European Fellowships (IEF) Coordinateur KATHOLIEKE UNIVERSITEIT LEUVEN Contribution de l’UE € 160 600,00 Adresse OUDE MARKT 13 3000 Leuven Belgique Voir sur la carte Région Vlaams Gewest Prov. Vlaams-Brabant Arr. Leuven Type d’activité Higher or Secondary Education Establishments Contact administratif Stijn Delauré (Dr.) Liens Contacter l’organisation Opens in new window Site web Opens in new window Coût total Aucune donnée
