Light Exotic Dripline Nuclei and 8B Structure
M. V. Zhukov
チャルマース工科大学／スウェーデン
日時：2001年06月08日（金） 16:15-17:30
場所：東北大学理学部物理A棟604号室
Present days' nuclear physics has focus on exploring fundamental nuclear matter under extreme conditions, which can be created in modern accelerator laboratories. The opportunities offered by beams of exotic nuclei for research in the areas of nuclear structure physics, nucleosynthesis and nuclear astrophysics are exciting, and the large worldwide activity in the construction of radioactive beam facilities reflects the strong scientific interest in the physics that can be probed with such beams. The study of unstable (but still stable against particle decay) nuclei embraces many new aspects of nucleonic matter. It focuses on exotic properties of loosely-bound quantum systems, such as nuclei with giant halos or skins of neutron matter with extremely low density. With access to exotic nuclei the very limits of nuclear existence, that is, the edges of the nuclear landscape can be fully explored. Light nuclei constitute so far the part of the nuclear landscape where both the neutron and the proton driplines have been reached. In the first part of the talk we will briefly discuss experimental and theoretical achievements made in studies of light exotic nuclei. In the second part of the talk we will discuss the recent calculations of the structure of the 8B nucleus, which is a one-proton halo candidate and which plays an important role in our understanding of the nucleosynthesis in the Sun. The calculations were performed in the framework of the three-body (4He-3He-p) approach which allows to incorporate in the calculations the effects of strong deformation and dynamical polarization of the 7Be core as well as the core excitation. The results of the calculations will be compared with available experimental data, including recent experimental data on one proton removal cross sections at relativistic energies.
当日16:00より茶菓を用意いたします。