Berlin 2014 – wissenschaftliches Programm
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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. Eibach1,2,3, T. Beyer2,3, K. Blaum3, M. Block4, Ch. E. Düllmann1,4,5, K. Eberhardt1,5, J. Grund1, Sz. Nagy3,4, W. Nörtershäuser1,4,6, D. Renisch1, F. Schneider1, and C. Smorra3, 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.