Nuclear Seminar

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Date/Time:Tuesday, 22 Mar 2011 from 2:10 pm to 3:10 pm
Location:Room 19 Physics Building
Channel:Nuclear Physics
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"Many-body interactions and nuclear structure at the limits of stability," Morten Hjorth-Jensen, Department of Physics and Center of Mathematics for Applications, University of Oslo, Norway

The aim of this talk is to shed light on our understanding of many-body correlations in nuclei. Since all theoretical calculations involve effective Hamiltonians and effective Hilbert spaces, it is crucial to have a handle on the role many-body correlations play in a many-body system. This means that a sound theory should provide error estimates on the importance of neglected many-body effects. To understand these and develop mathematically rigorous error estimates is mandatory if one wants to have a predictive theory. In order to achieve the above, I will present several challenges to nuclear many-body theory and our understanding of the stability of nuclear matter. In particular, I will focus on our current understanding, or lack thereof, of many-body forces, and how they evolve as function of the number of particles. This is of fundamental importance if we wish to use theoretical results in analyzing properties of nuclei close to the dripline or the A-dependence of missing many-body correlations. In particular, I will report on studies of weakly bound nuclei, focusing on properties like binding energies and spectroscopic factors as functions of proton-neutron asymmetry.