学术报告:Significance of rho-tensor coupling in describing nuclear structure properties

2019/05/14 | 【 【打印】【关闭】 | 访问次数:

报告题目:Significance of rho-tensor coupling in describing nuclear structure properties

报 告 人:龙文辉,教授,兰州大学核科学与技术学院



个人简介:龙文辉,男,现为兰州大学核科学与技术学院教授。2000 年毕业于北京大学技术物理系,获学士学位;2002-2005年6月法国巴黎南大学原子核所理论物理专业博士研究生,2006年1月在北京大学物理学院获博士学位。2007-2009年分别在日本会津大学,德国慕尼黑技术大学,日本理化学研究所,日本东北大学,美国德州农机科莫斯分校等做博士后、访问学者和客座研究员等;2009年12月被兰州大学核科学与技术学院聘为教授。主要从事原子核结构理论和核天体物理方面的研究。其中奇特原子核综述论文2007年获评“中国百篇最具影响优秀国际学术论文”;2篇文章入选美国信息科学研究所ISI网站Highly Cited Papers;2010年入选教育部新世纪优秀人才支持计划;2014年获教育部自然科学奖一等奖。

报告内容 :Nuclear force and the consequences on nuclear structure are one of the heart topics in nuclear physics since the very early stage of the field. Based on the meson exchange diagram of nuclear force, the relativistic mean field theory, referred as the covariant density functional (CDF) theory in recent years, has achieved many successes in describing various nuclear phenomena. Further implemented with Fock terms, leading to the so-called relativistic Hartree-Fock (RHF) theory, significant improvements have been obtained in the self-consistent description of nuclear shell evolution, tensor force, spin-isospin excitations, new magicity, etc. In this talk, particular interests will be focused on the degree of freedom associated with the rho-tensor coupling that plays a role almost fully via the Fock terms. At the beginning of the talk, the brief introduction of the CDF theory w/o and with Fock terms is presented, including the theoretical framework and the roles of various meson degrees of freedom in describing the nuclear in-medium interactions. Afterwards, the significance of rho-tensor coupling in describing nuclear structure will be illustrated by two examples, the restoration of pseudo-spin symmetry and the self-consistent interpretation of the new magicity. In the end, a brief summary and perspective will be presented.