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MS: Fachverband Massenspektrometrie

MS 2: Precision Mass Spectrometry 1/ RIMS

MS 2.3: Vortrag

Montag, 17. März 2014, 14:45–15:00, DO24 1.205

High-precision mass measurements of transuranium nuclides at TRIGA-TRAP — •M. Eibach^1,2,3, T. Beyer^2,3, K. Blaum³, M. Block⁴, Ch. E. Düllmann^1,4,5, K. Eberhardt^1,5, J. Grund¹, Sz. Nagy^3,4, W. Nörtershäuser^1,4,6, D. Renisch¹, F. Schneider¹, and C. Smorra^{3, 7} — ¹Johannes Gutenberg-Universität, Mainz — ²Ruprecht-Karls-Universität, Heidelberg — ³Max-Planck-Institut für Kernphysik, Heidelberg — ⁴GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt — ⁵Helmholtz-Institut Mainz, Mainz — ⁶Technische Universität Darmstadt, Darmstadt — ⁷RIKEN Advanced Science Institute, Wako, Japan

Reflecting the sum of all interactions inside a nucleus, its mass is an important characterizing property. Precisely known nuclear masses are used to benchmark and improve nuclear mass models and to probe the nuclear structure. Penning-trap mass spectrometers such as TRIGA-TRAP are well-suited to provide such data with highest precision. At TRIGA-TRAP, the nuclides of interest are either produced by thermal neutron-induced fission of, e.g., ²³⁵U at the research reactor TRIGA Mainz or ionized off-line by a non-resonant laser ablation ion source. The latter was recently upgraded with a miniature radio-frequency quadrupole device resulting in an efficiency gain of more than an order of magnitude enabling for the first time direct mass measurements of long-lived transuranium nuclides. In this contribution the mass measurement results on ^241,243Am, ²⁴⁴Pu, and ²⁴⁹Cf will be presented. Their impact on nuclear structure studies as well as their implementation into the Atomic-Mass Evaluation will be discussed.