Mass measurements of exotic Calcium isotopes using ISOLTRAP’s multi-reflection time-of-flight (MR-ToF) mass spectrometer

by Frank Wienholtz (Ernst-Moritz-Arndt-Universität, Institut für Physik, 17487 Greifswald, Germany,)

Thursday 4 Jul 2013, 14:30 → 15:30 Europe/Zurich

26-1-022 (CERN)

State-of-the-art precision measurements on radioactive ions have been performed with the Penning-trap mass spectrometer ISOLTRAP at CERN. Minute production rates and millisecond half-lives pose enormous challenges on the experimental setup and often require new experimental techniques. The ISOLTRAP setup has recently been enhanced with an electrostatic mirror trap acting as a multi-reflection time-of-flight (MR-ToF) mass separator for beam purification. It can likewise be used as a spectrometer in combination with a suitable detector increasing the mass-measurement capability of ISOLTRAP considerably. The measurements on the calcium isotopic chain will be presented together with the nuclear structure they reveal. The measurements up to ⁵⁴Ca are compared with predictions from models that utilize three-body nuclear forces, where we find an excellent agreement