Dynamical calculation for fusion–fission probability in superheavy mass region, where mass symmetric fission events originate

✍ Scribed by Yoshihiro Aritomo; Masahisa Ohta

• Publisher: Elsevier Science
• Year: 2004
• Tongue: English
• Weight: 622 KB
• Volume: 744
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/j.nuclphysa.2004.08.009

✦ Synopsis

We discuss dynamically the fusion-fission mechanism in the superheavy mass region. By analyzing the mass distribution of fission fragments, we distinguish between the fusion-fission process and the quasi-fission process. We investigate these two processes using the fluctuation-dissipation model. The three-dimensional Langevin equation is employed. We classify the dynamical process by analyzing the trajectory in the nuclear deformation space. In the superheavy mass region, we found that 90-99% of mass symmetric fission events come from the quasi-fission process, in which the system hardly reaches the spherical region. The fusion cross section is also estimated precisely.