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HK: Fachverband Physik der Hadronen und Kerne

HK 52: Poster (b)

HK 52.17: Poster

Donnerstag, 2. April 2020, 16:30–18:30, Grotte

A cryogenic Paul trap for ²²⁹Th — •Daniel Moritz¹, Benedict Seiferle¹, Lars von der Wense^1,2, and Peter G. Thirolf¹ — ¹LMU München — ²JILA , Boulder , USA

The comparably low energy of the isomeric first excited nuclear state of ²²⁹Th, which has most recently been constraint to 8.28±0.17 eV [1], allows for direct laser excitation with current technology. This offers the unique opportunity to develop a nuclear clock [2] capable of competing with existing atomic clocks. One of the next steps towards the realization of such a clock is the determination of the ²²⁹Th isomer’s ionic lifetime, which is expected to be in the range of several minutes up to hours. In order to achieve the required ion storage times, a cryogenic Paul-trap is currently set up at the LMU Munich.

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".

[1] B.Seiferle et al., Nature 573, 243 (2019).

[2] E.Peik & C.Tamm, Europhys. Lett. 61, 181 (2003).