SMuK 2023 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 61: Structure and Dynamics of Nuclei XIII
HK 61.4: Vortrag
Donnerstag, 23. März 2023, 14:45–15:00, SCH/A117
Investigations of the internal conversion lifetime of 229mTh on various metal surfaces — •Daniel Moritz1, Sandro Kraemer1, Lilli Löbell1, Kevin Scharl1, Benedict Seiferle1, Lars von der Wense2, Florian Zacherl1, and Peter G. Thirolf1 — 1LMU München — 2Max-Plank-Institut für Quantenoptik
With its exceptionally low energy of the isomeric first excited nuclear state, which has most recently been constrained to 8.338(24) eV (i.e. λ=148.71(42) nm) [1], 229mTh is in the focus of current research as the only suitable candidate to build a nuclear clock based on it. One of the isomer’s properties to be further investigated is its internal conversion (IC) lifetime when IC is triggered by neutralization of 229mTh on a metallic catcher surface. After first hints on its dependence on the electronic environment of 229mTh [2], the IC lifetime of 229mTh2+,3+ ions will now be evaluated systematically for various metal surfaces with different work functions. This talk presents the current status of these investigations at LMU.
This work was supported by the ERC Synergy Grant "ThoriumNuclearClock", Grant agreement No. 856415.
[1] S. Kraemer et al., arXiv:2209.10276 (2022)
[2] B. Seiferle, Diss., LMU (2019)