Structure and Reactions Far from the Valley of Stability
- Nicolas Michel, MSU NSCL/iCER
Tuesday, February 19, 11:00 AM - Theory Seminar
NSCL Seminar Room
The new possibilities offered by accelerators of last generation have allowed to experimentally study exotic nuclei, lying close to drip-lines, which can be weakly bound or resonant at ground state level. Contrary to the nuclei of the valley of stability, they exhibit unique phenomena, such as halos, cluster emission, and strong isospin-symmetry breaking. In order to describe exotic nuclei at theoretical level, it is then necessary to include inter-nucleon correlations and continuum coupling in nuclear models, which demands bound, resonant and scattering states to be treated in a unified manner. For this, the real-energy Shell Model Embedded in the Continuum (SMEC) and the complex-energy Gamow Shell Model (GSM) have been developed for light nuclei. Indeed, continuum shell model is the tool of choice to describe small systems, due to its theoretical ability to include both continuum and correlation degrees of freedom in their entirety. However, that formalism cannot be used to cover the whole nuclear chart, due to the rapidly increasing shell model matrices dimensions with the number of nucleons. Hence, in order to describe heavy nuclei at drip-lines, the Gamow Hartree-Fock-Bogoliubov (GHFB) model has been introduced, where the HFB equations are solved using continuous bases of real or complex energies. Applications pertaining to both structure and reactions observables will be presented in these models.