Seminar Details

High-Precision Mass Measurements with the Penning Trap Mass-Spectrometer TRIGA-TRAP

Martin Eibach, Max-Planck-Institute
Friday, April 18, 11:00 AM - Special Seminar
NSCL Lecture Hall

Reflecting the sum of all interactions inside a nucleus, its mass is an important ground-state property. Precisely known nuclear masses are used to benchmark and improve nuclear mass models and to study the nuclear structure. Penning-trap mass spectrometers are well-suited to provide model-independent mass data with highest precision. At TRIGA-TRAP, the nuclides of interest will be 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 one order of magnitude enabling for the first time direct mass measurements of long-lived transuranium nuclides. In this talk the Penning trap mass spectrometer TRIGA-TRAP within the TRIGA-SPEC collaboration will be introduced. Furthermore, the latest mass measurement results on the long-lived transuranium nuclides 241,243Am, 244Pu, and 249Cf will be presented and their impact on nuclear structure studies as well as the Atomic-Mass Evaluation will be discussed.