Heidelberg 2015 – wissenschaftliches Programm

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MS: Fachverband Massenspektrometrie

MS 2: Precision Mass Spectrometry 2

MS 2.5: Vortrag

Montag, 23. März 2015, 15:45–16:00, PH/HS2

Recent high-precision mass measurements of transuranium nuclides at TRIGA-TRAP — •Dennis Renisch for the TRIGA-SPEC collaboration — Institut für Kernchemie, Johannes Gutenberg-Universität Mainz

The heaviest nuclei owe their existence to shell effects, without which they would immediately decay. The strength of shell effects is directly accessible through high-precision mass measurements, using Penning-trap mass spectrometers. TRIGA-TRAP is such an experiment, installed at the research reactor TRIGA Mainz. It is optimized for measurements of long-lived transuranium isotopes and of neutron-rich nuclides produced by neutron-induced fission inside the research reactor. Recent results of high-precision mass measurements of transuranium nuclides, including Pu-242, Bk-249, Cm-245/246/248 and Cf-249/250/251, will be presented. Direct mass measurements in this region of the chart of nuclei are important for mapping the evolution of the deformed shell closure at N=152 over several units in Z and as anchor points of α-decay chains for superheavy element (SHE) research.