Oak Ridge National Laboratory

Physics Division

Physics Division Seminars

Physics Division Seminars bring us speakers on a variety of physics related subjects. Usually these are held in the Building 6008 large Conference Room, at 3:00 pm on the chosen day, but times and locations may vary. For more information, contact our seminar chairman,

Alfredo Galindo-Uribarri
Tel (Office): (865) 574-6124  (FAX): (865) 574-1268

Thu., September 13, 2007, at 3:00 p.m. (refreshments at 2:40 p.m.)

Coupled-Cluster Approach to Nuclear Structure

Gaute Hagen, Joint Institute of Heavy Ion Research, Oak Ridge
Building 6008 Conference Room

Two of the frontiers in modern nuclear structure theory are understanding the role of three-nucleon forces in light and medium mass nuclei, and how they can be consistently related to the different realistic NN-forces, and the theoretical and experimental understanding of exotic phenomena in nuclei located far away from the valley of beta stability. Moving away from the valley stability, exotic phenomena emerge such as ground states embedded in the continuum, melting and reorganizing of shell structure, extreme matter clusterizations and halo-densities.

New and present radioactive beam facilities will open new unexplored territories at the limits of matter, new exotic phenomena at these extreme limits of matter will require theoretical underpinning and development of theory able to predict and provide guidance for experimental setups. Coupled-Cluster theory is ideal for this purpose. Coupled-Cluster theory is a fully microscopic theory, it is capable of systematic improvements and scales very gently with system size. The soft scaling allows one to reach into the medium mass region of the nuclear chart and to treat enormous basis sets.

I will discuss recent developments and applications of Coupled-Cluster theory to weakly bound and unbound nuclei in the Helium chain, the inclusion of three-nucleon forces in a Coupled-Cluster calculation, Coupled-Cluster calculation of 40Ca and prospects for future developments in medium mass nuclei.