Mainz 2026 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 15: Precision Mass Spectrometry (joint session MS/Q)
Q 15.6: Vortrag
Montag, 2. März 2026, 18:30–18:45, N 6
Recent mass measurements and the first application of mass-selective re-trapping at ISOLTRAP — •Daniel Lange for the ISOLTRAP collaboration — Max-Planck-Institut für Kernphysik, Heidelberg, Germany
The Isoltrap mass spectrometer [1], located at ISOLDE/CERN, performs high-precision mass measurements of short-lived, exotic nuclides far from stability. These measurements provide direct access to nuclear binding energies, which reflect the underlying nuclear interactions and enable studies in nuclear structure and nuclear astrophysics, among others. Precision mass measurements at the Isoltrap mass spectrometer are performed using various ion traps, including a tandem Penning-trap system and a multi-reflection time-of-flight mass spectrometer (MR-ToF MS). The latter is particularly well-suited for both efficient mass separation and fast, precise mass measurements.
In this contribution, recent mass measurements of neutron-deficient cadmium isotopes in the direct vicinity of the doubly-magic self-conjugate 100Sn nucleus will be presented. Furthermore, the advancements in ion purification with the first application of the mass-selective re-trapping technique [2], enabled by a newly implemented mini-RFQ following the MR-ToF MS, will be shown.
Based on the mass measurement of neutron-rich argon using this technique, the feasibility of low-yield experiments in the presence of extremely abundant isobaric contamination and its limitations will be demonstrated.
[1] Lunney, D. et al., J. Phys. G: Nucl. Part. Phys. 44, 064008 (2017)
[2] Dickel, T. et al., J. Am. Soc. Mass Spectrom. 28, 1079-1090 (2017)
Keywords: precision mass spectrometry; nuclear structure; RIB; MR-ToF; ISOLTRAP