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Abstract：Nuclear force and model are essential to understand the complicated quantum many-body systems, atomic nuclei. In recent years, many observations have been on nuclei far from the stability line, including the discovery of new nuclides and isomeric states, energy levels, electromagnetic properties, and α and β decays. To understand the underlying physics, it is worth comparing these properties between observations and calculations within one model and one nuclear force. In this talk, I will introduce the configuration-interaction shell model (CISM) and its applications from light to heavy nuclei. For example, the discovery of new nuclides, 223Np, 214U, 207Th, and 18Mg, will be introduced with their impact on understanding nuclear structure. Isomeric states of Ag, In isotopes, and N = 127 isotones are analyzed through nuclear interaction, especially its tensor part and contribution to the type I and II shell evolution. Cross-shell excitation in light nuclei shows the possible difference between the diagonal and off-diagonal parts of the cross-shell interaction. Isospin symmetry breaking is discussed in sd shell nuclei indicating the largest mirror asymmetry and strongest isospin mixing in β decays. Finally, based on uncertainty analysis of phenomenological models, preliminary results are presented on the CISM uncertainty using a unified nuclear force with different strengths in proton-proton and neutron-neutron interactions.
Biography: Mr. Cenxi Yuan is now an associate professor, Yat-sen scholar, and deputy dean at the Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-Sen University. He obtained his bachelor degree and Ph.D. degree from Peking University in 2006 and 2012, respectively. During study, he has been to the University of Tokyo as a CSC joint Ph.D. from 2010 to 2011. After graduating from PKU, he served as an assistant professor at Sun Yat-Sen University since 2012 and became associate professor in 2018, doctoral supervisor in 2019, dean assistant from 2020 to 2021, deputy dean in 2021, Yat-sen Scholar in 2022. Up to the present, he has supervised 37 master theses and is now supervising 3 Ph.D. and 4 master students. He was awarded as Hu Jimin Education and Science Award of the Chinese Nuclear Physical Society in 2019 and the Tip-top Scientific and Technical Innovative Youth Talents of Guangdong special support program in 2017. His research interest is in nuclear structure theory and neutronics, such as the properties of extreme proton- and neutron-rich nuclei and the neutronic properties of novel reactor design, contributing to 96 SCI indexed publications (7 PRL, 16 PLB, 6 PRCR/L, 30 PRC regular).
Online meeting room：https://meeting.tencent.com/dm/MMOTxBFUFrJG（id: 571322178 密码: 123456）