Microscopic HFB Fission Barriers for r-Process Nucleosynthesis Calculations

✍ Scribed by M. Samyn; S. Goriely

• Publisher: Elsevier Science
• Year: 2005
• Tongue: English
• Weight: 260 KB
• Volume: 758
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/j.nuclphysa.2005.05.118

✦ Synopsis

New systematic calculations of fission barriers are performed in the 3-dimensional deformation space using the constrained Skyrme-Hartree-Fock-Bogoliubov (SHFB) plus Particle-Number Projection method. The BSk8 Skyrme force, fitted to the full set of more than 2000 experimentally known masses, is used. The energy surfaces are analysed using the flooding method, a necessary tool if more than two dimensions are spanned.

The SHFB outer fission barriers are compared with experimental data. The reflection asymmetry is shown to play a significant role in the Z ≈ 94 open-shell region. Extrapolations in the neutron-rich region can differ with the previous compilations of fission barriers.