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HK: Fachverband Physik der Hadronen und Kerne

HK 56: Poster - Struktur und Dynamik von Kernen

HK 56.5: Poster

Mittwoch, 6. März 2013, 16:45–19:00, HSZ 4.OG

Precision mass measurements of exotic calcium isotopes using ISOLTRAP’s multi-reflection time-of-flight mass spectrometer — •Frank Wienholtz — Ernst-Moritz-Arndt-Universität, Institut für Physik, 17487 Greifswald, Germany

State-of-the-art precision measurements on radioactive ions have been performed with the Penning-trap mass spectrometer ISOLTRAP at CERN. Minute production rates often accompanied by huge isobaric background 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 ion trap acting as a multi-reflection time-of-flight mass separator (MR-ToF MS) 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.