INPAC-Seminar 121：The structure of nuclei around 100Sn (Dr. C. Qi, Apr.11, 2013)

Title: The structure of nuclei around 100Sn

Speaker: Dr. C. Qi,  KTH, Stockholm, Sweden

Time and place: 12:00-13:00, April 11 (Thursday), 2013, Lecture Hall/INPAC

Abstract:

In this talk I would like to address a few issues regarding the seniority structure of nuclei around 100Sn. In particular, I will show that the seniority symmetry is dynamically conserved in j=9/2 shells irrespective of type of interaction. This may be a unique phenomenon for nuclear physics, which is characterized by large spin-orbit coupling. The collectivity in Sn isotopes may be enhanced by the mutual effect of seniority and pseudospin symmetry. Moreover, I will show for systems with equal number of protons and neutrons, the seniority coupling is broken and, as a result, a new form of spin-aligned proton-neutron pair coupling is favored. It should be mentioned that all these works are done in collaboration with or inspired by experimentalists in Stockholm and other groups.