The Dual Nature of the Nuclei - From Shell Model to Isospin Diffusion
Betty Tsang
Michigan State University
日時：2004年12月09日（木） 16:15-
場所：大学院講義室（総合研究棟7階745号室）
The success of the Shell Model proposed more than 40 years ago to explain the existence of the magic numbers of 2, 8, 20, 28, 50, 82 and 128 in neutron and protons has allowed the understanding of many observed nuclear properties. It also prompted many studies in the past four decades to describe the configuration of single particle orbitals. One experimental observable is the spectroscopic factor, which has been studied intensively for the last 40 years. In this talk, I will review the ground state neutron spectroscopic factors extracted for 75 nuclei from Li to Cr isotopes. It is also well known that the liquid drop model, which ignores the single particle nature of the nuclei, has enjoyed much success in the predictions of the binding energies of the nuclei. The symmetry energy term in the liquid drop mass formula is relevant in determining the limit of the nuclear landscape and the extrapolation to asymmetric nuclear matter. At subnormal and supernormal density, the symmetry energy is key to the existence of exotic nuclei as well as the structure of neutron stars. In this talk, I will also describe our attempt to understand the density dependence of the symmetry energy by studying the isospin diffusion in heavy ion reactions.
16：00より茶菓を用意いたします。