Köln 2025 – wissenschaftliches Programm
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MS: Fachverband Massenspektrometrie
MS 1: Heavy and Superheavy Elements
MS 1.2: Vortrag
Montag, 10. März 2025, 15:30–15:45, HS 2 Chemie
Mass Measurements of Actinides at TRIGA-Trap — •Tanvir Sayed1, Klaus Blaum1, Michael Block2,3, Burcu Cakirli1, Stanislav Chenmarev1, Christoph Düllmann2,3, Szilard Nagy1, and Dennis Renisch2,3 — 1Max-Planck-Institut für Kernphysik, Heidelberg, DE — 2Helmholtz-Institut Mainz, DE — 3Department Chemie - Standort TRIGA, Mainz, DE
TRIGA-Trap is a high-precision, double Penning-trap mass spectrometer. Masses of actinides including 244Pu, 241Am, 243Am, 248Cm, and 249Cf have been measured using the Phase-Imaging Ion-Cyclotron-Resonance (PI-ICR) technique with parts-per-billion precision [1]. The precise mass measurements allow to explore nuclear structure through trends in mass filters, such as S2n (two-neutron separation energies) and δ Vp,n (average p-n interaction of the most loosely-bound two nucleons), as well as their differentials. Measurements of nuclei in the neutron-deficient Pu isotopic chain – 238Pu, 239Pu, 240Pu, and 242Pu – are in preparation to enhance the current dataset and complement ongoing nuclear structure studies. In particular, the shell evolution with increase in neutron number N towards the N=152 sub-shell closure for proton number Z=94 can be investigated, and the predictive capabilities of nuclear shell models for heavy, deformed nuclei can be assessed. In this talk, an overview of the current status of the experiment, as well as future directions, will be discussed.
References: [1] S. Chenmarev, K. Blaum, M. Block et al. Masses of transuranium nuclides measured with the PI-ICR technique at TRIGA-Trap. Eur. Phys. J. A 60, 204 (2024).
Keywords: Actinide; PI-ICR; Nuclear Structure; Mass Filters; Precision Mass Measurements