Münster 2017 – wissenschaftliches Programm
HK 41.2: Vortrag
Donnerstag, 30. März 2017, 14:30–14:45, F 2
Recent technical developments and mass measurements above the potentially doubly-magic nuclide 78Ni at ISOLTRAP — •Andree Welker1 and ISOLTRAP Kollaboration2 — 1TU-Dresden, Dresden, Deutschland — 2CERN, TU-Dresden, MPIK Heidelberg, Universität Greifswald,
ISOLTRAP  mass measurements of neutron rich copper isotopes are presented. 79Cu could be addressed by the first time using a Multi-Reflection Time-of-Flight Mass Spectrometer (MR-ToF MS) . With only one proton above the Z = 28 core, the binding energies of the copper isotopes are sensitive to the evolution of nuclear shell structure close to the doubly-magic 78Ni isotope. Preliminary results in combination with a shell-model theory will be shown. To reach even more exotic nuclides and to improve ISOLTRAP’s mass precision limit, a position-sensitive ion detector was installed upstream the precision Penning-trap. It will allow the application of the Phase-Imaging Ion-Cyclotron-Resonance (PI-ICR) detection method developed at SHIPTRAP/GSI . This new method offers compared to the presently used Time-Of-Flight Ion-Cyclotron-Resonance detection technique higher precision and resolution in shorter measurement time, and thus the ability to resolve low-lying isomers. The current status, first measurements, and an outlook on the implementation of the PI-ICR technique at ISOLTRAP will be presented.  S. Kreim et al. Nucl. Instrum. Methods B 317, 492-500 (2013).  R.N. Wolf et al. Int. J. Mass Spectrom. 349-350, 123-133 (2013).  S. Eliseev et al. Appl. Phys. B 114, 107-128 (2014).