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(Seminar) On the Stability of Super-Heavy Nuclei
2018-04-24     Text Size:  A

CAS Key Laboratory of Theoretical Physics

Institute of Theoretical Physics

 Chinese Academy of Sciences

Seminar

Title

题目

On the Stability of Super-Heavy Nuclei

Speaker

报告人

Professor K. Pomorski

Affiliation

所在单位

Marie Curie-Sklodowska University, Lublin, Poland

Date

日期

15:00, Apr 24 (Tuesday), 2018

Venue

地点

Conference room 6620 New Building

Abstract

摘要

The potential-energy surfaces of an extended set of heavy and super-heavy even-even nuclei with 92 ≤ Z ≤ 126 and isospin 40 ≤ N - Z ≤ 74 are evaluated within the recently developed Fourier shape parametrization. Ground-state and decay properties are studied for 324 different even-even isotopes in a four-dimensional deformation space, de fined by non-axiality, quadrupole, octupole, and hexadecapole degrees of freedom. Nuclear deformation energies are evaluated in the framework of the macroscopic-microscopic approach, with the Lublin-Strasbourg-Drop model and a Yukawa-folded mean- field potential. The evolution of the ground-state equilibrium shape and possible shape-isomeric states is studied as a function of Z and N. Alpha-decay Q-values and half-lives, as well as fission-barrier heights, are deduced. In order to understand the transition from asymmetric to symmetric fission along the Fm isotopic chain, the properties of all identified fission paths are investigated. Good agreement is found with experimental data wherever available. New interesting features about the population of different fission modes for nuclei beyond Fm are predicted.

Contact person

所内联系人

Shan-Gui Zhou (周善贵)

 

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