Münster 2017 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 41: Structure and Dynamics of Nuclei VI

HK 41.7: Vortrag

Donnerstag, 30. März 2017, 15:45–16:00, F 2

A new nuclear laser excitation scheme for 229mTh — •Lars von der Wense1, Benedict Seiferle1, Adriana Pálffy2, and Peter G. Thirolf11Ludwig-Maximilians-Universität München, 85748 Garching, Germany — 2Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany

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. Only recently, measurements were performed that have led to the direct detection of the ground-state decay of 229mTh [1] and a first characterization of the isomeric decay parameters [2]. Based on this information, a new nuclear laser excitation scheme for 229mTh is proposed. This excitation scheme circumvents the general assumed requirement of a better knowledge of the isomeric energy value, thereby paving the way for nuclear laser spectroscopy of 229mTh.
[1] L. v.d.Wense et al., Nature 533 (2016) 47-51.
[2] B. Seiferle et al., submitted for publication.
Supported by DFG grant TH956/3-1 and Horizon 2020 research and innovation programme under grant agreement 664732 "nuClock".

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