Shape isomers (SI) in actinide nuclei are poorly understood metastable states lying in the second super-deformed prolate potential well. Their unique characteristics include a super-deformed shape, a low spin - similar to that of the normally-deformed ground state - and a main decay mode that is spontaneous fission. Although many such isomers have been discovered in the actinides since their...
In the process of βDF, an excited state populated in β decay close to the top of the fission barrier in the daughter nucleus undergoes fission (in competition with γ-ray or particle emission). The achievable excitation energy is limited by Qβ value of the parent nucleus, which is typically less than ~10 MeV in the lead region, or even less than ~5 MeV in actinides. Therefore, βDF represents...
Neutronics codes accuracy is now driven by the knowledge of their nuclear data used as input, and the structure of nuclei plays a very important role in nuclear reactors, whether for experimental or theoretical physics. Several cross sections are listed on the High Priority Request List (HPRL) [1] for improvements. In this presentation, we will show how improving the knowledge of the nuclear...
