报告题目：Clustering and bound state formation in nuclear matter

报告时间：2022-12-14

主办方：复旦大学 - 核科学与技术系/现代物理研究所、核物理与离子束应用教育部重点实验室、国家自然科学基金委-理论物理专款、上海核物理理论研究中心

协办方: Nuclear Science and Techniques

摘要：Nuclear systems are treated in the framework of a quantum statistical approach. Correlations and cluster formation are of relevance to the properties of nuclei and dense nuclear matter at finite temperature. Using a Green's function approach, in-medium Schroedinger equations are derived for few-nucleon clusters such as deuterons and alpha particles in nuclear matter. The shift in binding energies due to Pauli blocking leads to the dissolution of bound states (Mott effect). Consequences for composition, equation of state, symmetry energy, phase transitions and the formation of quantum condensates (pairing, quartetting) are shown. Medium modifications of bound states in nuclear matter are observed in heavy ion collisions. Cluster structures and Bose condensates in nuclei, alpha-decay and fission are indications of correlations in nuclear matter. The study of supernova explosions, the structure of the crust of neutron stars, and the evolution of neutron star mergers requires a description of nuclear matter that takes correlations and cluster formation into account.

报 告 人： Gerd Röpke 教授

德国University of Rostock

报告人简介：Gerd Röpke is a professor emeritus and the former vice president of the University of Rostock in Germany. He got the PhD at the University of Leipzig in 1966. After being an assistant professor at the Technical University of Dresden and an lecturer at the University of Rostock, he took the professorship since 1987. His main research interests lie in various branches of theoretical physics including quantum statistics, nonequilibrium, statistical physics with applications for plasma physics, solid state physics and nuclear physics. He has published more than 600 articles and 7 monographs. He is recognized as one of the worldwide experts in nuclear physics and used to serve in the presidium of the German Physical Society, the Council of the European Physical Society and chair several physics committee in Germany and Russia.