Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 321-325 |
| Seitenumfang | 5 |
| Fachzeitschrift | NATURE |
| Jahrgang | 556 |
| Ausgabenummer | 7701 |
| Publikationsstatus | Veröffentlicht - 19 Apr. 2018 |
| Extern publiziert | Ja |
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.
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in: NATURE, Jahrgang 556, Nr. 7701, 19.04.2018, S. 321-325.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Laser spectroscopic characterization of the nuclear-clock isomer 229mTh
AU - Thielking, Johannes
AU - Okhapkin, Maxim V.
AU - Głowacki, Przemysław
AU - Meier, David M.
AU - Von Der Wense, Lars
AU - Seiferle, Benedict
AU - Düllmann, Christoph E.
AU - Thirolf, Peter G.
AU - Peik, Ekkehard
N1 - 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’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.
PY - 2018/4/19
Y1 - 2018/4/19
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85045671656&partnerID=8YFLogxK
U2 - 10.1038/s41586-018-0011-8
DO - 10.1038/s41586-018-0011-8
M3 - Article
C2 - 29670266
AN - SCOPUS:85045671656
VL - 556
SP - 321
EP - 325
JO - NATURE
JF - NATURE
SN - 0028-0836
IS - 7701
ER -