Joint HE/NP Seminar
Speaker: Erich Ormand
Title: The Structure of Light Nuclei within a First-principles Framework: Giant Monopole and Dipole Excitations
Host: Svoboda
Room: 432
Abstract:A fundamental question in nuclear theory today is whether it is possible to describe atomic nuclei as a collection of protons and neutrons interacting via a realistic potential. These realistic interactions are based on the underlying physics of quantum chromodynamics (QCD) and are determined from two- and three-body properties. In essence, we wish to build complex nuclei from what we have learned from few-body systems. In the past decade, substantial progress has been made in this arena with the advent of new theoretical methods and high-performance computing. From these efforts, several things have been learned, such as the importance of the three-body interaction, as well as limitations in our formulation of the interaction itself. Most efforts in the past have focused on low-lying properties of nuclei. In this presentation, I will review the current situation, and describe our recent efforts to compute the properties of the collective modes in nuclei; in particular giant monopole and dipole resonances for light nuclei. The formalism will be outlined and comparisons with experimental data for 10B will be shown. We will also address the Brink-hypothesis by examining the dipole response built upon excited states.
