Freiburg 2024 – wissenschaftliches Programm

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MS: Fachverband Massenspektrometrie

MS 7: Accelerator Mass Spectrometry III

MS 7.1: Hauptvortrag

Donnerstag, 14. März 2024, 11:00–11:30, HS 3042

High-precision mass measurements for nuclear structure and nuclear astrophysics — •Anu Kankainen — University of Jyväskylä, Department of Physics, Accelerator laboratory, P.O. Box 35(YFL), FI-40014 University of Jyväskylä, Finland

High-precision atomic mass measurements with a Penning trap provide a way to precisely determine nuclear binding energies even for short-lived radioactive nuclei. Nuclear binding energies serve as excellent testing points for nuclear models and understanding nuclear structure far from stability. Masses are also key inputs for nuclear astrophysics applications, such as for the rapid neutron capture process (r process) responsible for around half of the heavy-element abundances above iron. Penning-trap mass spectrometry can also be used to determine excitation energies of isomeric states.

We have measured more than 460 atomic masses, including over 70 isomeric states, with the JYFLTRAP double Penning trap mass spectrometer at the Ion Guide Isotope Separator On-Line (IGISOL) facility in the Accelerator Laboratory of the University of Jyväskylä, Finland. A large number of low-lying isomeric states have been recently measured with the phase-imaging ion cyclotron resonance technique. In many cases, the measurements have been supported by laser or post-trap decay spectroscopy to further identify the studied states. In my presentation, I will give an overview with selected highlights on our precision mass measurements for nuclear structure and astrophysics.

Keywords: Penning trap; Nuclear structure; Nuclear astrophysics; Isomers