Köln 2025 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 17: Structure and Dynamics of Nuclei VI
HK 17.3: Vortrag
Dienstag, 11. März 2025, 16:30–16:45, HS 2 Physik
Microscopic description of collective inertias for fission — •Nithish Kumar Covalam Vijayakumar1,2, Gabriel Martínez-Pinedo2,1, Luis Robledo3, and Samuel Andrea Giuliani3 — 1Institut für Kernphysik, Technische Universität Darmstadt, Darmstadt, Germany — 2GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany — 3Universidad Autónoma de Madrid, Madrid, Spain
The theoretical description of nuclear fission is a challenging quantum many body problem since it involves quantum tunneling of the nuclei through fission barriers. This tunneling is very sensitive to the collective inertia along the fission path. In most of the fission calculations, the collective inertia is evaluated using cranking approximation which neglects the dynamical residual effects. In this work, we are developing a scheme to compute collective inertias using finite amplitude method - quasiparticle random phase approximation (FAM-QRPA) which also takes into account the consistent treatment of dynamical effects. FAM-QRPA code is currently being developed using the finite range Gogny energy density functionals and axial symmetry preserving Hartree-Fock-Bogoliubov framework. The completed FAM-QRPA code will be then used to study the role of collective inertia in fission probabilities and the role of fission in r-process nucleosynthesis. Once the code is developed, it can also be used to study electromagnetic response of nuclei. This work is supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) Project-ID 499256822 GRK 2891 ‘Nuclear Photonics’.
Keywords: Nuclear fission; Finite amplitude method; Gogny energy density functionals; r-process nucleosynthesis