SMuK 2023 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 20: Structure and Dynamics of Nuclei III
HK 20.2: Gruppenbericht
Dienstag, 21. März 2023, 17:30–18:00, SCH/A118
Ab initio structure of neutron-rich calcium isotopes — •Matthias Heinz1,2,3, Kai Hebeler1,2,3, Jan Hoppe1,2, Takayuki Miyagi1,2, Achim Schwenk1,2,3, S. Ragnar Stroberg4, and Alexander Tichai1,2,3 — 1Technische Universität Darmstadt, Department of Physics — 2ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH — 3Max-Planck-Institut für Kernphysik, Heidelberg — 4Department of Physics and Astronomy, University of Notre Dame
The in-medium similarity renormalization group (IMSRG) has emerged as a flexible and powerful method for the ab initio description of atomic nuclei. Its current standard truncation including up to normal-ordered two-body operators, the IMSRG(2), has been very successful in the description of systems up to mass numbers 100 and beyond. For certain observables, however, the IMSRG(2) truncation is not sufficient and the inclusion of three-body operators, the IMSRG(3), is required.
We apply the IMSRG(3) to neutron-rich calcium isotopes, delivering a more precise many-body treatment of these systems. We find an improved description of the shell-closure at 48Ca. We also discuss sources of observed discrepancies between experiment and theory in the charge radii of these systems.
* Funded by the ERC Grant Agreement No. 101020842.