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(Seminar) On the Stability of Super-Heavy Nuclei

04/24 2018
  • Title (Seminar) On the Stability of Super-Heavy Nuclei
  • Speaker
  • Date
  • Venue
  • Abstract

    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)