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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) |