Laser spectroscopic characterization of the nuclear-clock isomer ^229mTh

verfasst von: Johannes Thielking, Maxim V. Okhapkin, Przemysław Głowacki, David M. Meier, Lars Von Der Wense, Benedict Seiferle, Christoph E. Düllmann, Peter G. Thirolf, Ekkehard Peik
Abstract: The isotope ²²⁹Th is the only nucleus known to possess an excited state ^229mTh in the energy range of a few electronvolts- A transition energy typical for electrons in the valence shell of atoms, but about four orders of magnitude lower than typical nuclear excitation energies. Of the many applications that have been proposed for this nuclear system, which is accessible by optical methods, the most promising is a highly precise nuclear clock that outperforms existing atomic timekeepers. Here we present the laser spectroscopic investigation of the hyperfine structure of the doubly charged ^229mTh ion and the determination of the fundamental nuclear properties of the isomer, namely, its magnetic dipole and electric quadrupole moments, as well as its nuclear charge radius. Following the recent direct detection of this long-sought isomer, we provide detailed insight into its nuclear structure and present a method for its non-destructive optical detection.
Externe Organisation(en): Physikalisch-Technische Bundesanstalt (PTB)
Poznan University of Technology
Ludwig-Maximilians-Universität München (LMU)
GSI Helmholtzzentrum für Schwerionenforschung GmbH
Helmholtz-Institut Mainz
Johannes Gutenberg-Universität Mainz
Typ: Artikel
Journal: NATURE
Band: 556
Seiten: 321-325
Anzahl der Seiten: 5
ISSN: 0028-0836
Publikationsdatum: 19.04.2018
Publikationsstatus: Veröffentlicht
Peer-reviewed: Ja
ASJC Scopus Sachgebiete: Allgemein
Elektronische Version(en): https://doi.org/10.1038/s41586-018-0011-8 (Zugang: Unbekannt)

BibTeX

@article{1b665b1f7ed14bc18dee4b6c87a126c0,
title = "Laser spectroscopic characterization of the nuclear-clock isomer 229mTh",
abstract = "The isotope 229Th is the only nucleus known to possess an excited state 229mTh in the energy range of a few electronvolts- A transition energy typical for electrons in the valence shell of atoms, but about four orders of magnitude lower than typical nuclear excitation energies. Of the many applications that have been proposed for this nuclear system, which is accessible by optical methods, the most promising is a highly precise nuclear clock that outperforms existing atomic timekeepers. Here we present the laser spectroscopic investigation of the hyperfine structure of the doubly charged 229mTh ion and the determination of the fundamental nuclear properties of the isomer, namely, its magnetic dipole and electric quadrupole moments, as well as its nuclear charge radius. Following the recent direct detection of this long-sought isomer, we provide detailed insight into its nuclear structure and present a method for its non-destructive optical detection.",
author = "Johannes Thielking and Okhapkin, {Maxim V.} and Przemys{\l}aw G{\l}owacki and Meier, {David M.} and {Von Der Wense}, Lars and Benedict Seiferle and D{\"u}llmann, {Christoph E.} and Thirolf, {Peter G.} and Ekkehard Peik",
note = "Funding information: We thank C. Mokry, J. Runke, K. Eberhardt and N. G. Trautmann for the production of the 233U source and M. Ehlers, S. Hennig and K. Kossert for the PTB 229Th source. We acknowledge discussions with C. Tamm and B. Lipphardt and thank T. Leder, M. Menzel and A. Hoppmann for technical support. We acknowledge financial support from the European Union{\textquoteright}s Horizon 2020 Research and Innovation Programme under Grant Agreement number 664732 (nuClock), from DFG through CRC 1227 (DQ-mat, project B04) and TH956-3-2 and from the LMU Department of Medical Physics via the Maier– Leibnitz Laboratory.",
year = "2018",
month = apr,
day = "19",
doi = "10.1038/s41586-018-0011-8",
language = "English",
volume = "556",
pages = "321--325",
journal = "NATURE",
issn = "0028-0836",
publisher = "Nature Publishing Group",
number = "7701",
}

Laser spectroscopic characterization of the nuclear-clock isomer 229mTh

Laser spectroscopic characterization of the nuclear-clock isomer ^229mTh