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From actinides to superheavy nuclei: covariant density functional theoretical perspective
2016-12-22  【 】【打印】【关闭

Institute of Theoretical Physics

Chinese Academy of Sciences

 Key Laboratory of Theoretical Physics

Seminar

Title

题目

From actinides to superheavy nuclei: covariant density functional theoretical perspective

Speaker

报告人

Professor Anatoli Afanasjev

Affiliation

所在单位

Mississippi State University

Date

日期

16:00, Dec 22 (Thursday), 2016

Venue

地点

ITP NEW BUILDING 6420

Abstract

摘要

Science is driven by the efforts to understand unknowns. In low-energy nuclear physics many such unknowns are located at the extremes of the nuclear landscape. The region of superheavy elements (SHEs), characterized by the extreme values of proton number Z, is one such extreme. Contrary to other regions of the nuclear chart, the SHEs are stabilized only by quantum shell effects. Because of this attractive feature and the desire to extend the nuclear landscape to higher Z values, this region is an arena of active experimental and theoretical studies.
In my talk I will focus on recent results obtained for the actinides and SHEs within the framework of covariant density functional theory (CDFT). In its framework the nucleus is described as a system of nucleons which interact by the exchange of different mesons and this description is based on the Dirac equation.
Because of the limitations of experimental data on SHEs, the actinides are playing an important role in the benchmarking of the covariant energy density functionals. Their single-particle, rotational and fission properties were studied within the CDFT framework and confronted with available experimental data in a systematic way. The reexamination of the structure of SHEs in the CDFT has recently been performed by us; it resulted in a substantial revision of our understanding of the role of shell closures. All available data on SHEs have been confronted with the calculations and theoretical uncertainties in the description and prediction of their properties have been deduced. This is done both for the ground state properties and fission barriers.
 

Contact Person

联系人

Shan-Gui Zhou (周善贵)
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