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HK: Fachverband Physik der Hadronen und Kerne

HK 60: Structure and Dynamics of Nuclei XI

HK 60.2: Gruppenbericht

Freitag, 3. April 2020, 11:30–12:00, J-HS H

Towards a nuclear clock with ²²⁹Th — •Benedict Seiferle¹, Daniel Moritz¹, Lars von der Wense², and Peter Thirolf¹ — ¹LMU Munich — ²JILA, Boulder, USA

With an excitation energy of 8.28±0.17 eV [1], the first isomeric state in ²²⁹Th (called ^229mTh) is the only (currently known) nuclear state that can be excited with today’s laser technology. Its properties make ^229mTh an ideal candidate for a nuclear optical clock, which is expected to compete with optical atomic clocks. Experiments that led to the first direct energy determination of ^229mTh, as well as future experiments aiming towards a nuclear optical clock will be presented.
[1] B. Seiferle et al., Nature 573, 243 (2019).
This work was supported by DFG (Th956/3-2) and by the European Union’s Horizon 2020 research and innovation program under grant agreement 6674732 "nuClock".