學術報告:Significance of rho-tensor coupling in describing nuclear structure properties

2019/05/14 | 【 【打印】【關閉】 | 訪問次數:

報告題目:Significance of rho-tensor coupling in describing nuclear structure properties

報 告 人:龍文輝,教授,蘭州大學核科學與技術學院

報告時間:2019年5月21日星期二,9:30-11:30,

報告地點:上海光源,張江科研樓203室

個人簡介:龍文輝,男,現為蘭州大學核科學與技術學院教授。2000 年畢業于北京大學技術物理系,獲學士學位;2002-2005年6月法國巴黎南大學原子核所理論物理專業博士研究生,2006年1月在北京大學物理學院獲博士學位。2007-2009年分別在日本會津大學,德國慕尼黑技術大學,日本理化學研究所,日本東北大學,美國德州農機科莫斯分校等做博士后、訪問學者和客座研究員等;2009年12月被蘭州大學核科學與技術學院聘為教授。主要從事原子核結構理論和核天體物理方面的研究。其中奇特原子核綜述論文2007年獲評“中國百篇最具影響優秀國際學術論文”;2篇文章入選美國信息科學研究所ISI網站Highly Cited Papers;2010年入選教育部新世紀優秀人才支持計劃;2014年獲教育部自然科學獎一等獎。

報告內容 :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.

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