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Q: Fachverband Quantenoptik und Photonik

Q 15: Precision Mass Spectrometry (joint session MS/Q)

Q 15.4: Vortrag

Montag, 2. März 2026, 18:00–18:15, N 6

High-Precision Mass Measurements of Actinides at TRIGA-Trap for Nuclear Structure Studies — •Tanvir Sayed¹, Klaus Blaum¹, Michael Block^2,3,4, Burcu Cakirli¹, Stanislav Chenmarev¹, Christoph Düllmann^2,3,4, Szilard Nagy¹, and Dennis Renisch^2,3 — ¹Max-Planck-Institut für Kernphysik, Heidelberg, DE — ²Helmholtz-Institut Mainz, DE — ³Department Chemie - Standort TRIGA, Mainz, DE — ⁴GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, DE

Actinides encompass an important region of the chart of nuclides with great relevance in nuclear and astrophysics research. The TRIGA-Trap experiment – set-up in the TRIGA research reactor hall at the University of Mainz – involves high-precision mass measurements of heavy radioactive nuclides, in particular actinides, with a double Penning-Trap mass spectrometer [1,2]. Recent measurements include nuclides in the Pu isotopic chain namely ²³⁸Pu, ²³⁹Pu, ²⁴⁰Pu, ²⁴²Pu. The precise masses can be used to compute mass filters, such as S_2n (two-neutron separation energies), to explore nuclear structure in heavy, deformed nuclei as well as test predictions from present nuclear shell models. This presentation will provide an overview of the current status of the experiment, discuss recent results along with their application in nuclear structure evaluation, and outline future prospects.

References: [1] J. Ketelaer et al. Nucl. Instrum. Meth. A 594, 162-177 (2008). [2] S. Chenmarev, S. Nagy, J.J.W. van de Laar et al. Eur. Phys. J. A 59(2), 29 (2023).

Keywords: Actinides; Penning Trap; Pu Isotopes; Mass Filters; Nuclear Structure