报告题目：High-momentum Correlated Nucleons and Tensor Blocking Effects Determine the Shell Structure in Neutron Rich Nuclei
报告人：Prof. Isao Tanihata （Beihang University）
报告时间：2019年7月23日（周二）上午10:00
报告地点：北京大学物理学院7802会议室(物理西楼213)
联系人：孟杰（mengj@pku.edu.cn）
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Abstract:
A new paradigm for nuclear structure that includes blocking effects of tensor interactions is proposed. All of the recently discovered magic numbers (N=6, 14, 16, 32 and 34) in neutron-rich nuclei can be explained by the blocking effects. A large amount of binding energy is gained by high-momentum correlated pairs of nucleons produced by the tensor interaction. Such tensor correlations strongly depend on the configuration space available for exciting the 2p-2h states. When additional neutrons occupy a new orbital, the previously available configuration may be lost, resulting in a sudden loss of binding energy otherwise gained by the 2p-2h excitation. Such tensor blocking effects enlarge the energy gaps at all observed new magic numbers. Tensor blocking also explains consistently the observed peculiar configurations of neutron-rich nuclei at the borders of shells.
In the present talk present status of tensor correlations in nuclei will be introduced firstly. Then a new model of nuclei, Tensor Blocking Shell Model, will be introduced and be used to explain new magic numbers, break down of traditional magic numbers, and other peculiar phenomena observed in neutron rich nuclei.
