Heidelberg 2015 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 58: Nuclear Astrophysics 4

HK 58.2: Talk

Thursday, March 26, 2015, 17:15–17:30, K/HS2

Gogny-HFB calculation for r-process nucleosynthesis: towards a fully-converged microscopic mass table. — •Alexander Arzhanov^1,2, Tomás R. Rodríguez^1,3, and Gabriel Martínez-Pinedo^1,2 — ¹Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany. — ²GSI Helmholtzzentrum für Schwerionenforschung, Planckstraße 1, D-64291 Darmstadt, Germany. — ³Departamento de Física Teórica, Universidad Autónoma de Madrid, E-28049 Madrid, Spain.

Any realistic model of r-process nucleosynthesis requires accurate predictions of nuclear masses for isotopes beyond the reach of currently available experimental facilities, thus one has to rely on theoretical nuclear masses. In recent years there has been a lot of progress in developing microscopic mass models based on energy density functional techniques. We have performed a large-scale calculation of nuclear masses based on Hartree-Fock-Bogolyubov (HFB) approach with Gogny-type functionals. We analyze in detail the convergence properties of the computed masses, which are related to the finite size of the working basis used in the self-consistent HFB calculations. We find a lack of convergence in the previously published results, and perform a systematic study of recently proposed extrapolation techniques to an infinite working basis size. We also discuss its applicability to global calculations of nuclear masses.