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

Wed., August 07, 2013, at 3:00-4:00 pm (refreshments served at 2:40 PM)

Large-Scale Shell Model Calculation with Core Excitations for Neutron-rich Nuclei around 132Sn

Yang Sun, Department of Physics & Astronomy and Center for Nuclear Astrophysics, Shanghai Jiao Tong University, Shanghai 200240, China
ORNL, Bldg. 6008 Large Conference Room

Shell-model is an essential tool for detailed understanding of exotic nuclear structure and for providing necessary input for astrophysical models and simulations. We have made progress in development of nuclear shell models, both the large-scale shell model based on a spherical basis and the projected shell model based on a deformed basis.

In this talk, we present results from our recent large-scale shell model calculations for neutron-rich nuclei with a few particles or holes around 132Sn. For a considerably large model space including neutron and proton core excitations, a new effective interaction based on the extended PQQM force is determined. The model provides a systematical description for energy levels of A~130 nuclei, both for low and high spin states, and reproduces available data of electromagnetic transitions. This theoretical development is relevant to the recent experimental programs in this mass region.

We also give an overview of the present nuclear physics research in China. A representative example is the research with the newly-constructed Cooler Storage Ring in Lanzhou, which has so far been successful in measuring nuclear masses of very proton-rich nuclei, and has made contributions for understanding the N=Z waiting points along the path of rp-process in type-I X-ray bursts as well as for testing the isobaric multiplet mass equation (IMME) in fp-shell nuclei. Shell model with explicit inclusion of the Coulomb and isospin nonconserving forces has been developed to study the isospin-symmetry-breaking effect in the upper fp shell.

Contact: Alfredo Galindo-Uribarri, (865) 574-6124