Freiburg 2024 – wissenschaftliches Programm

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MS: Fachverband Massenspektrometrie

MS 1: Precision Mass Spectrometry

MS 1.5: Vortrag

Montag, 11. März 2024, 12:15–12:30, HS 3042

High-precision mass measurements of heavy and superheavy elements with SHIPTRAP — •Francesca Giacoppo for the SHIPTRAP collaboration — GSI Darmstadt, Germany — HIM Mainz, Germany

Probing the limit of existance at the uppermost corner of the nuclear chart requires a deep understanding of the nuclear properties of very heavy nuclides and their evolution in the superheavy region. Superheavy nuclei owe their existence to nuclear shell effects, which enhance their stability. The latter is also expressed in terms of increased binding energies, which can be experimentally investigated through direct mass measurements performed with Penning traps, providing information on the nuclear shell structure. If sufficient mass resolving power is achieved, the excitation energies of low-lying, long-lived metastable nuclear states, very common in the heaviest nuclei, can be obtained from the directly measured masses.

The SHIPTRAP experiment was developed to study heavy and superheavy nuclei produced via fusion-evaporation reactions at rates well below one particle per hour through Penning trap mass spectrometry. Thanks to the implementation of a cryogenic buffer-gas stopping cell and the development of the Phase-Imaging Ion-Cyclotron-Resonance technique, more exotic nuclei can be studied with even better precision and higher resolving power. In this contribution, a summary of the latest results, obtained as part of the FAIR phase-0 campaigns, will be presented.

Keywords: High-precision mass measurements; PI-ICR method; Super Heavy Elements; Ground states; Low-lying isomeric states