Description of the multidimensional potential-energy surface in fission of Cf252 and No258
| Autor: | Zdeb, A., Warda, M., Robledo Martín, Luis Miguel |
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| Přispěvatelé: | Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), UAM. Departamento de Física Teórica |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Physical Review C Physical Review C, American Physical Society, 2021, 104 (1), pp.014610. ⟨10.1103/PhysRevC.104.014610⟩ Biblos-e Archivo. Repositorio Institucional de la UAM instname |
| ISSN: | 2469-9985 2469-9993 |
| Popis: | International audience; Microscopic studies of nuclear fission require the evaluation of the potential-energy surface as a function of the collective coordinates. A reasonable choice of constraints on multipole moments should be made to describe the topography of the surface completely within a reasonable amount of computing time. We present a detailed analysis of fission barriers in the self-consistent Hartree-Fock-Bogoliubov approach with the D1S parametrization of the Gogny nucleon-nucleon interaction. Two heavy isotopes representing different spontaneous fission modes, Cf252 (asymmetric) and No258 (bimodal), have been chosen for the analysis. We have shown the existence of complicated structures on the energy surface that cannot be fully described in two-dimensional calculations. We analyze apparent problems that can be encountered in this type of calculations: multiple solutions for given constraints and transitions between various overlapping potential-energy surfaces. These issues may be partially solved by the analysis of the potential-energy surface spanned by triple constraints, but even in this case one may find multiple solutions and surface discontinuities. Analysis of the potential-energy surface in two dimensions is often very successful but it must be carried out with special attention to possible discontinuities. |
| Databáze: | OpenAIRE |
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