Erlangen 2026 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 14: Structure and Dynamics of Nuclei IV
HK 14.6: Vortrag
Dienstag, 17. März 2026, 17:45–18:00, AM 00.021
Electromagnetic response of nuclei using Gogny energy density functionals — •Nithish Kumar Covalam Vijayakumar1,2, Gabriel Martínez-Pinedo2,1, Luis Miguel Robledo Martín3, and Samuel Andrea Giuliani3 — 1Institut für Kernphysik,Technische Universität Darmstadt, Darmstadt, Germany — 2GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany — 3Universidad Autónoma de Madrid, Madrid, Spain
Electromagnetic response of nuclei plays an important probe in the understanding of nuclear structure. This quantity is fundamental for the description of neutron capture and photodissociation rates for r-process nucleosynthesis. R-process studies require calculations of many nuclei and typically the response is extracted by using linear response approaches such as quasiparticle random phase approximation (QRPA). But the standard QRPA approach is computationally expensive. A more efficient way of solving the QRPA equations based on Finite amplitude method (FAM) was introduced and thus making its applications more advantageous for heavy nuclei. In this work, we have developed a FAM computer code using the finite range Gogny energy density functionals and axial symmetry preserving Hartree-Fock- Bogoliubov framework. Various test calculations of the new code and the comparison of electromagnetic response results with standard QRPA calculations and available experimental data was performed. We also plan to extend the approach of FAM in the context of nuclear fission for evaluating collective inertias.
Keywords: Electromagnetic response of nuclei; R-process nucleosynthesis; Quasiparticle Random Phase Approximation; Finite amplitude method; Gogny energy density functionals