München 2019 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 50: Structure and Dynamics of Nuclei X
HK 50.2: Vortrag
Donnerstag, 21. März 2019, 14:30–14:45, HS 16
Towards a 229mTh energy determination with 40 µeV accuracy — •L. von der Wense1, B. Seiferle1, Ch. Schneider2, J. Jeet2, I. Amersdorffer1, N. Arlt1, F. Zacherl1, R. Haas3,4,5, D. Renisch3,4, Pa. Mosel6, Ph. Mosel6, M. Kovacev6, U. Morgner6, Ch.E. Düllmann3,4,5, E.R. Hudson2, and P.G. Thirolf1 — 1Ludwig-Maximilians-Universität München — 2University of California, Los Angeles — 3Johannes Gutenberg-Universität Mainz — 4Helmholtz-Institut Mainz — 5GSI Helmholtzzentrum für Schwerionenforschung GmbH — 6Leibniz Universität Hannover
The development of a nuclear clock has been a long-standing objective [1]. There is only one nuclear excitation known which could allow for the development of a nuclear clock due to its exceptionally low energy of only a few eV above the ground state. This is the metastable first excited state in 229Th [1,2]. The development of a 229Th-based nuclear clock is so far hindered by an insufficient knowledge of the excited state’s energy. A new scheme of experimental search will be presented, which could allow to pin down the isomeric energy value to 40 µeV accuracy, thereby paving the way to the development of a nuclear clock [3]. The concept makes use of a direct nuclear laser excitation scheme.
[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).
Supported by DFG grant TH956/3-2 and Horizon 2020 research and innovation programme under grant agreement 664732 “nuClock".