Hannover 2016 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 50: Precision spectroscopy of atoms and ions II (with A)
Q 50.4: Vortrag
Donnerstag, 3. März 2016, 12:00–12:15, f428
Mass measurements of neutron-rich copper isotopes and technical developments at ISOLTRAP — •Andree Welker1 and ISOLTRAP Collaboration2 — 1Institut für Kern- und Teilchenphysik, Technische Universität Dresden, 01069 Dresden, Germany — 2CERN
We present very recent results from ISOLTRAP [1] measurements of neutron rich copper isotopes, where - with the help of the multi-reflection time-of-flight mass spectrometer (MR-ToF) [2] - 79Cu was reached for the first time. With the gained knowledge of the copper binding energies, which are a really sensitive probe for the evolution of shell structure, we are only one proton above the Z = 28 core, close to the doubly-magic 78Ni isotope. These measurements belong to an extended ISOLTRAP campaign on very neutron-rich nuclides for nuclear-structure and astrophysical cases. To be able to reach out even further exotic nuclides at very high precision, a position-sensitive ion detector was installed behind the precision Penning trap. This major step will allow the application of the Phase-Imaging Ion-Cyclotron-Resonance (PI-ICR) [3] method, which was developed at SHIPTRAP/GSI. The new technique offers higher precision in less measurement time as well as a much higher resolving power, and thus the ability to resolve low-lying isomers, compared to the present Time-of-Flight Ion-Cyclotron-Resonance (ToF-ICR) technique [4]. The current status and an outlook on the implementation of the PI-ICR technique at ISOLTRAP will be presented.