GENESE 17 · Geometries of Exotic NuclEar StructurE 17
Horizon 2020 — Marie Skłodowska-Curie Actions
- Duration
- 2018-12-01 → 2021-11-01
- EU contribution
- €185,076
- Participants
- 2
- Scheme
- MSCA-IF-EF-ST
Lines connect the coordinator with its partners.
Results in brief
Geometries of Exotic NuclEar StructurE 17
Symmetry originates from the word “Συμμετρία” and means “with rule”. This meaning is close to the concept of rhythm in the sense of a well-defined pattern. In modern science, the concept of symmetry plays a profound role in understanding the structure of matter and the fundamental interactions, among others. For example, in nuclear structure, the rhythms (symmetries) that nucleons collectively “dance” within an atomic nucleus reflect the geometrical shapes presented on the surface of that nucleus. GENESE 17 originated from investigating the relation between nuclear shapes and the symmetries of fundamental interactions in conjunction with exploring the structure of short-lived nuclei. These are the exotic nuclei that die in a very short time after their genesis inside the stars. On earth, exotic nuclei are produced artificially in laboratories such as GANIL in France using Radioactive Beams (RIBs). GENESE 17 is a project in basic research and as such, its importance for society is of long term. The objectives of this project are classified into two parts: The first part includes the theoretical description and analysis of phenomena investigated mainly in exotic nuclei such as shape coexistence, pear-shaped nuclei, and proton emitters. The second part introduces a novel theoretical understanding of nuclear structure using conformal symmetry. In addition, it proposes new phenomena to be examined in nuclear physics experiments with RIBs.
Data: CORDIS, © European Union
Project objective
This project deals with the theoretical description and explanation of the phenomenology of geometries manifested in the shapes of exotic nuclei. The phenomenology concerns low-energy states of a nucleus under study and transitions between them. The project consists of two parts. Part I will provide theoretical descriptions of experimental data, chiefly taken in GANIL with Radioactive-Ion Beams, related with shape coexistence (objective GN1), pear-shaped nuclei (GN2) and shape/phase transitions (GN3). The theoretical models to be used are the Geometric Collective Model (GCM) and the Shell Model (SM). Part II will introduce conformal symmetry in nuclear structure as a means to explain the occurrence of nuclear shapes.It will be introduced in the SM (GN4) to investigate the emergence of the GCM from complex many-body calculations. This will be achieved by extending the SU(3) model of quadrupole deformation and a related description of octupole deformation through algebraic methods used in classical Yang-Mills theories. Conformal symmetry will also be introduced in the GCM (GN5) as a means to import higher symmetries in the GCM and investigate their relation with single-particle effects. This will be achieved based on a geometric method using formal correspondences with cosmological models, recently explored by the candidate. These correspondences will be extended to methods used in the gravitational multipole moments with the aim to propose the conformal symmetry of space as a fundamental symmetry of the nuclear multipole moments. In parallel, patterns of conformal symmetry in nuclear structure will be investigated numerically within the Interacting Boson Model. The theoretical results of Part II will be examined in shape coexistence, pear shaped nuclei and shape/phase transitions.During this entire project precious transfer of knowledge will occur between the candidate, the supervisor and the experimental groups in GANIL.
Original text from CORDIS.
Participants
Links
Data: CORDIS, © European Union