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HK: Fachverband Physik der Hadronen und Kerne

HK 54: Hauptvorträge III

HK 54.1: Hauptvortrag

Freitag, 2. März 2018, 11:00–11:30, Audimax

Milestone toward a nuclear clock: On the direct detection of ^229mTh — •Lars von der Wense — LMU München

The measurement of time has always been an important tool in science and society. ^229mTh offers the potential for the development of an ultra-precise nuclear clock that may outperform existing atomic clock technology. However, despite 40 years of past research, no direct decay detection of this nuclear state was achieved. Experiments are described that have led to the first direct detection of the ground-state decay of ^229mTh [1] and a first characterization of the isomeric decay parameters [2]. Based on this direct detection, a new nuclear laser excitation scheme was proposed [3] and a first laserspectroscopic characterization of ^229mTh was performed [4].

[1] L. v.d.Wense et al., Nature 533, 47-51 (2016).

[2] B. Seiferle et al., PRL 118, 042501 (2017).

[3] L. v.d.Wense et al., PRL 119, 132503 (2017).

[4] J. Thielking et al., Nature, accepted for publication.

Supported by DFG grant TH956/3-2 and Horizon 2020 research and innovation programme under grant agreement 664732 nuClock.